Oversized for hunters and fisherman, the Slumberjack Big Timber rectangular sleeping bag features a 10-ounce cotton duck outer shell and heavy-duty zipper. The roomy proportions and warm, 100 percent cotton flannel liner guarantees a restful sleep, and it's temperature rated to -20 degrees Fahrenheit. It offers a double layer quilt-through construction and Slumberloft HQ fill, which provides great warmth and loft at a great price. Other features include an insulated draft tube with anti-snag zipper protection, an adjustable storm collar, easy-grab pull tabs, and compression straps at the bottom of the bag. This long bag has a maximum user height of 6 feet, 5 inches.

Specifications:

• Size: 38 by 80 inches
• Carry size: 10 by 38 inches
• Fill weight: 6 pounds, 8 ounces
• Carry weight: 11 pounds, 8 ounces
• Shell: 10-ounce cotton duck
• Liner: 100 percent yarn-dyed cotton flannel

About Slumberjack
Slumberjack has been known as the outdoor sleep expert or for more than 50 years. They have built this reputation for being the best by building the finest quality sleeping systems in the world, while addressing the needs of virtually all market segments from backpacking and trekking to family camping and hunting and fishing. With over five decades of experience in the industry, Slumberjack has taught everyone that "roughing it" doesn't have to mean being uncomfortable. That's why their selection of sleeping bags, self-inflating mats, self-inflating chairs, camp furniture, bivy shelters, and accessories offers a choice for every season and a fit for nearly every size and shape.

Amazon.com Sleeping Bag Guide
Sleep Well: Finding the Right Sleeping Bag
Sleeping bag technology has come a long way from the days of cowboy bedrolls. These days, there are a number of high-tech materials and designs available to keep you warm during the coldest outings. Here's a short list of things to keep in mind when you're shopping for a bag:

Buy for Cold
It's a safe bet that on at least one of your adventures, the nighttime temperature will drop unexpectedly. That's why it's smart to buy a bag that's rated for the lowest possible temperature you expect to face on your camping and backpacking trips. For summer trips, a bag rated at +35 degrees or higher will likely do the trick. If you like to camp in higher elevations in the summer, or if spring and fall outings are in your future, consider bags rated from +10 to +35. Winter adventurers should look for bags in the -10 to +10 range, while those on serious winter alpine climbs and expeditions will want a bag rated lower than -10.

Keep in mind that sleeping bag manufacturers' temperature ratings only estimate the minimum temperature at which the bag will provide warmth. Take these numbers with a grain of salt, as different folks generate different amounts of heat when they sleep. If you're the type who likes to pile on the covers even on warmer nights, go for a bag that's rated ten degrees colder. The opposite is true for "warm" sleepers--a 35-degree bag will probably work for you on a 25-degree night.

Goose or No Goose?
The most important component of any sleeping bag is its insulating material. Modern sleeping bags offer two choices: goose down or synthetic. While both materials have advantages and disadvantages, down bags are considered superior because of their phenomenal warmth-to-weight and warmth-to-bulk ratios. While providing great insulation, down is extremely compressible and light. There's a reason why geese can fly and stay warm through the winter! Down also boasts great long-term durability and will typically retain its insulating properties after years of use.

All of that said, there are many high-quality synthetic bags on the market and synthetic materials are getting better all the time. While a synthetic bag will weigh somewhat more than a down bag at an equivalent temperature rating, synthetic bags perform better when wet. (Yes, the Achilles heel of down is that it loses all insulating properties when wet.) If your trips take you to wet climates, you may want to consider a synthetic bag for this reason alone. Keep in mind, too, that many people are allergic to down--synthetic bags are non-allergenic. Finally, down is considerably more expensive than synthetic, which might tip the balance for adventurers on a budget.

Bags for All Shapes
Sleeping bags come in two basic shapes that reflect their intended use. Mummy-shaped bags offer the best warmth because they conform to the body's contours. This minimizes the amount of body heat the body must put out to maintain a constant temperature. Many mummy bags are offered in women-specific shapes and sizes, as well. Rectangular bags, while they do offer more room to toss and turn, are less thermally efficient because they contain more open air space. Also, they are typically heavier than mummy bags, and are generally not offered with down insulation, making them best suited for car camping or short backpacking trips.

Pad Yourself
No matter what kind of bag you choose, a sleeping pad is a required accessory. Not only do they provide much-needed comfort when sleeping on the ground, pads also offer crucial warmth for your backside, as the weight of your body compresses--and renders virtually useless--the sleeping bag insulation that lies beneath you.

Customer Review: great buy for big guy
This product is well worth it. I go camping a lot. There's plenty of room which I love. I'm 6'2" 265lbs so if your big get this bag...I slept great and was nice and warm. Bigger than I expected.
Customer Review: Winter Sleeping Bag is WARM & QUIET -Love it!
This sleeping bag is really great. It is far warmer than my other nylon bags, and comparable to a 6 inch thick down comforter. And I mean that in a good way. The cotton duck outer (like soft canvas) and comfy flannel inner is just awesome - and QUIET. I just love the quietness. All my older bags have been nylon which make a lot of rustling noises which bother me everytime I move (and anyone else trying to sleep nearby). This SlumberJack Big Timber long sleeping bag is so cushy soft you almost don't need an air mattress. But you'll sleep better if you do have one. I can highly recommend the ThermaRest Base Camp air mattress. It's really great, and last for dozens of years! Therm-a-Rest Base Camp (Large) The one thing to be aware of is that no air mattress does well if you leave it all blown up in a hot trailer. It will pOp! or at least get a slow leak. If I hadn't done that, I'd still be using the same ThermaRest I got in the 1980's and slept on sharp rocks & broken glass without a puncture nor leak. Tough! So deflate it some before you leave it for the day (or season) and you'll never have a problem. This sleeping bag has a BIG square foot end, so there is tons of unrestricted room for feet. Totally opposite of mummy bags. Zipper is good quality metal. I sometimes feel a slight draft near the zipper, but this bag is so warm that is ok - just slightly refreshing. This bag is wider than most, which is ok - I have plenty of room. But it might be a squeeze in a small tent. This is NOT a backpacking bag. It's too bulky & heavy to lug around all day. But it's perfect for car camping! It's possible to use this bag in the summer, but you will be opening it just to cool off about half the time. Get yourself another sleeping bag for summer. This is the most comfortable winter sleeping bag I have ever had, and I'm happy to recommend it now. EDIT: I actually have the 0 degree bag. I still love it.

Designed for people who want compactability and lightweight gear without sacrificing comfort and quality. Ideally suited for fast packers, canoeists, kayakers, bike and motorcycle campers and even family campers. Features: Thermolite Extreme insulation for exceptional warmth and performance without extra weight Single layer construction Nylon Diamond ripstop outer shell SlumberWick, quick-dry liner removes moisture for added warmth and comfort Fully contoured hood with flip-over option and easy access drawcords Half-length, insulated draft tube prevents heat loss through zipper Anti-snag zipper protection repels biting zipper coils Easy-grab pull tabs facilitate quick zippering Trapeziod design with ventilated foot box for extra room and thermo regulation Style: Long Size: 34"x86" Fill Weight: 1 lb 2 oz Carry Weight: 3 lbs 1 oz Carry Size: 7.5"x12"Manufacturer: Slumberjack. Manufacturer#: SJ01620. Approximate Shipping Weight (lbs): 3.45.

Great of the individual who is seeking a bag that will grow in length as the child grows. 30*F temperature rating for Spring and Summer. Features: - Fill: Slumberloft HQ Insulation - Outer: 190T Polyester Taffeta outer shell - Liner: Polyester Taffeta - Construction: Double offset with differential cut - Other: Flat adjustable hood / Insulated draft tube with anti-snag zipper protection / Easy-grab pull tabs / Trapezoid foot box / Expandable foot section - Color: Dark Navy/Sunset - Maximum User Height: 5' 5" - Dimensions: 30"x65" - Fill Weight: 1 lb 8 oz - Carry Weight: 3 lbs - Carry Size: 8"x15"Manufacturer: Slumberjack. Manufacturer#: SJ05094G24. Approximate Shipping Weight (lbs): 3.85.

Slumberjack Ultimate 20 degree F... your ultra lightweight, compact Sleeping Bag! Go light. Go fast. Go small. It weights less than 2 lbs., compresses down to the size of a football and is incredibly warm... even when wet. This is a great Sleeping Bag for canoeists, kayakers, mountain bikers and motorcylists. A comfort rating to 20 degree F, and much, much more: Thermolite Extreme synthetic fill is light and lofty insulation for a 20 degree F comfort rating; Single layer construction; Durable nylon diamond ripstop outshell; Polyester taffeta liner; Half-length draft tube with anti-snag zipper protection helps retain body heat; Easy-grab pull tabs and easy access drawcords; Trapezoidal, ventilated foot box to keep your feet from getting too toasty (so original it's patent pending); Rolls up to approx. 7 1/2" x 1' for easy storage and travel. This Bag is extra long for users up to 6'5" tall. It measures approx. 2'10" x 7'2" and weighs 3 lbs. 2 ozs. It has a 1 lb. 13 oz fill weight, and a left zipper. Lighten your load. AVAILABLE SEPARATELY: Slumberjack Ultimate 20 Regular Right, Sage / Navy / Rage / Charcoal - word search in our Store for 'Slumberjack'. Slumberjack Ultimate 20 Long Left, Sage / Navy / Rage / Charcoal
Customer Review: Slumberjack Ultimate 20F Long Sleeping Bag
We used this product last year on Isle Royale National Park, backpacking/canoing for a week. I had this bag, and several of the others in our group had Slumberjack 30F bags. These bags are made for backpacking, and are light. Twice during our stay the temperature dropped to around 36 degrees. I was comfortable throughout our stay, as were members of our group with 30F bags. A) These bags are made to be unpacked/uncompressed for storage, or prior to use, to keep the insulation material expanded. They are meant to be put in the compression sack for travel only. B) There is a breathable opening in the bottom of the bag, to aid in circulation/humidity reduction, if the temperature is warm. Remember to keep this closed in colder temperatures. C) As far as not being able to compress the bag back into the compression sack provided with the bag, none of us have ever had a problem packing this sleeping bag back into the bag that it came in. D) We(my wife and I)are traveling back to Isle Royale in 2008, and we just purchased a new Ultimate 20F sleeping bag for my wife, to replace her old Coleman. The trade off is the weight of the bag, and the size when compressed. E) For reference, we both are using ThermaRest ProLite 4 sleeping pads, which normally adds some R-Value for sleeping. Do your research. If you are camping in a tent, but traveling by car/truck/camper, where you have a lot of storage room, get a bag that is large, comfortable, warm, and easy to use. The weight/size of the bag will not be an issue. If you are backpacking, and have to carry everything you need, pack out everything you brought in, including any trash, carry all your food, carry water filters, first aid, etc, etc, every ounce of weight will start to count. That is what separates this bag, or more specifically, this type of bag. I am not saying this is the best bag on the market, but for the money we wanted to spend, we consider it a great deal. The temperature rating is also a moving target, depending on your age, physical condition, gender, metabolic rate, diet, and myriads of conditions. In the end, you will need to be your own subject matter expert on how much insulation/covering you will need down to 20 degrees. Both my wife and myself tested out this bag, with the pad, prior to heading for the Island, to make sure we were comfortable enough with the weight of the bag, its insulating value, and the ease of use. We gave this bag a rating of 4.5 stars. The only reason we did not give it 5 stars was that the zipper did not go down further. We have not experienced any mechanical problems with this bag. Good luck
Customer Review: Unaccurate temp rating (and potentially dangerous)
I've owned this bag for two years and have camped with it both in the Cascades and Appalachians for a total of 25 nights. When initially evaluating the bag, I was excited to find a 20-degree bag in the 3-lb range, at an attractive pricepoint. My first night on Frosty Mountain in 34F temp made me regret that decision - I got about 1 hour of sleep after shivering the remainder of the evening. This was also in conjunction with a closed cell pad. I've tried sleeping with clothes on, with clothes off (clothes off seems to allow the bag to "cook" you more). On later trips, I started using REI's thermarest knockoff with an R-value of 3, rather than closed-cell foam. Still, no improvement in comfort. Basically, this is an okay bag down to 45F. Between 45F-40F, you'll need to definitely enclose the hood tightly around your face to minimize leakage (and you'll still be cold). I would not use this below 40F - EVER! You'll have a bad sleep and not enjoy the next day's hike. One cool feature about the bag is the pull strings on the hood - there are two cords - one that cinches the top of the hood, and a different one for the bottom. The manufacturer wisely made each cord of different diameters to make it easier in the dark to "know" which one you need to cinch to enclose your hood. When I purchased this bag, I was still new to backpacking. Since then, I've found far superior products at comparable pricepoints. If you are evaluating this bag, you are also probably new to backpacking and are trying to minimize the cost while you gear up. My advice is to spend money on a good bag - you won't regret it. As for the SlumberJack....mine is getting replaced with a nice Western Mountaineering Kodiak. I will only use the Slumberjack as a backup bag for guests during summer months.

Slumberjack Latitude Mummy Sleeping Bag, 20 degrees F... a cozy style for adventure seekers of all levels! The secret behind the mummy bag? Its design leaves less space around your body, and the less space that needs to be warmed by body heat, the warmer the bag will be. Check out these great features and wide array of styles that are sure to satisfy: Slumberloft HQ premium synthetic insulation maintains performance and loft year after year. Designed to stay warm all over... cold spots are eliminated with the double and triple offset, differential cut construction; Season after season durability thanks to the polyester hex ripstop outer and polyester taffeta liner; Trapezoid ventilated footbox for extra room and temperature control; Keep the hood nice and snug with easy access drawcords and barrel lock closures; Hook and loop closure prevents zippers from separating and allowing heat to escape; Anti-snag zipper tape sewn along draft tube and liner so zipper won't get stuck. State Style, as available in the Shopping Cart below. Pick your Bag and get camping! Style: Regular Right Zip; Size: 32 x 82"; Fill Weight: 2 lbs., 4 ozs.; Carry Weight: 3 lbs., 14 ozs.; Carry Size: 9 x 20"; Style: Long Left Zip; Size: 34 x 86"; Fill Weight: 2 lbs., 8 ozs.; Carry Weight: 4 lbs., 3 ozs.; Carry Size: 9 x 20"; Style: Short Right Zip; Size: 30 x 74"; Fill Weight: 1 lb., 13 ozs.; Carry Weight: 3 lbs., 1 ozs.; Carry Size: 9 x 17"; Order now! AVAILABLE SEPARATELY: Slumberjack Latitude 0
Customer Review: Not bad for the price
I would not rate this at -20 F. I slept in 33'F right after I received it, and I got cold feet and cold in the sleeping bag. I did not have socks on, and I was wearing a t-shirt only; however, I would expected to stay warmer at the temperature rating. Additionally, the stuff bag is much too small for the sleeping bag. I have tried rolling this bag as tight as I can get it, but it doesn't fit in the stuff bag.
Customer Review: Slumberjack Latitude-20F
My son was planning a winter camping trip to Yellowstone and needed a sleeping bag to keep warm at night. I purchased this sleeping bag because of the ad to stay warm at -20F and the price. I was very impressed with the sleeping bag when it arrived, and my son said that he stayed nice and warm and toasty.

Slumberjack Latitude Mummy Sleeping Bags -20 degree F... a cozy style for adventure seekers of all levels! The secret behind the mummy bag? Its design leaves less space around your body, and the less space that needs to be warmed by body heat, the warmer the bag will be. Check out these great features and wide array of styles that are sure to satisfy: Slumberloft HQ premium synthetic insulation maintains performance and loft year after year. Designed to stay warm all over... cold spots are eliminated with the double and triple offset, differential cut construction; Season after season durability thanks to the polyester hex ripstop outer and polyester taffeta liner; Trapezoid ventilated footbox for extra room and temperature control; Keep the hood nice and snug with easy access drawcords and barrel lock closures; Hook and loop closure prevents zippers from separating and allowing heat to escape; Anti-snag zipper tape sewn along draft tube and liner so zipper won't get stuck. State Style. Pick your Bag and get camping! Style: Regular Right Zip; Size: 32 x 82"; Fill Weight: 5 lbs.; Carry Weight: 6 lbs., 7 ozs.; Carry Size: 13 x 21"; Style: Long Left Zip; Size: 34 x 86"; Fill Weight: 5 lbs., 8 ozs; Carry Weight: 7 lbs., 3 ozs.; Carry Size: 13 x 22"; Style: Short Right Zip; Size: 30 x 74"; Fill Weight: 3 lbs., 14 ozs.; Carry Weight: 5 lbs., 2 ozs.; Carry Size: 11 x 18" Order now! AVAILABLE SEPARATELY: Slumberjack Latitude 20 degree F Mummy Bag; Slumberjack Latitude 0 deg

Part of Slumberjack's Grand Canyon line of sleeping bags, the oversized, rectangular Esplanade sleeping bag is a great choice for state park trekkers--whether camping in a tent, an RV, or car. The full-length insulated draft tube with anti-snag zippers seals out the cold. Rated to -20 degrees Fahrenheit, it offers a double-layer offset construction with a differential cut that allows insulation to loft fully. Other features include easy-grab pull tabs, an adjustable storm collar, and an internal media pocket for storing your iPod. It has a durable polyester hex ripstop exterior construction and comfortable polyester/cotton blend liner. It comes with a compression stuff sack. This bag can be machine washed and hung to dry.

It's filled with Slumberloft HQ, a synthetic fiber composed of a 50 percent hollow core polyester fiber joined with a 50 percent solid core polyester fiber, providing great warmth and loft at a great price.

• Construction: Double layer offset construction with differential cut
• Outer: Polyester hex ripstop
• Liner: Polyester cotton
• Size: 34 by 84 inches
• Maximum user height: 5 feet 11 inches
• Fill Weight: 5 pound 10 ounces
• Carry Weight: 7 pounds 14 ounces
• Carry Size: 12 by 20 inches
• Color: Reflex Blue / Sunflower / Black / Charcoal

About Slumberjack
Slumberjack has been known as the outdoor sleep expert or for more than 50 years. They have built this reputation for being the best by building the finest quality sleeping systems in the world, while addressing the needs of virtually all market segments from backpacking and trekking to family camping and hunting and fishing. With over five decades of experience in the industry, Slumberjack has taught everyone that "roughing it" doesn't have to mean being uncomfortable. That's why their selection of sleeping bags, self-inflating mats, self-inflating chairs, camp furniture, bivy shelters, and accessories offers a choice for every season and a fit for nearly every size and shape.

Amazon.com Sleeping Bag Guide
Sleep Well: Finding the Right Sleeping Bag
Sleeping bag technology has come a long way from the days of cowboy bedrolls. These days, there are a number of high-tech materials and designs available to keep you warm during the coldest outings. Here's a short list of things to keep in mind when you're shopping for a bag:

Buy for Cold
It's a safe bet that on at least one of your adventures, the nighttime temperature will drop unexpectedly. That's why it's smart to buy a bag that's rated for the lowest possible temperature you expect to face on your camping and backpacking trips. For summer trips, a bag rated at +35 degrees or higher will likely do the trick. If you like to camp in higher elevations in the summer, or if spring and fall outings are in your future, consider bags rated from +10 to +35. Winter adventurers should look for bags in the -10 to +10 range, while those on serious winter alpine climbs and expeditions will want a bag rated lower than -10.

Keep in mind that sleeping bag manufacturers' temperature ratings only estimate the minimum temperature at which the bag will provide warmth. Take these numbers with a grain of salt, as different folks generate different amounts of heat when they sleep. If you're the type who likes to pile on the covers even on warmer nights, go for a bag that's rated ten degrees colder. The opposite is true for "warm" sleepers--a 35-degree bag will probably work for you on a 25-degree night.

Goose or No Goose?
The most important component of any sleeping bag is its insulating material. Modern sleeping bags offer two choices: goose down or synthetic. While both materials have advantages and disadvantages, down bags are considered superior because of their phenomenal warmth-to-weight and warmth-to-bulk ratios. While providing great insulation, down is extremely compressible and light. There's a reason why geese can fly and stay warm through the winter! Down also boasts great long-term durability and will typically retain its insulating properties after years of use.

All of that said, there are many high-quality synthetic bags on the market and synthetic materials are getting better all the time. While a synthetic bag will weigh somewhat more than a down bag at an equivalent temperature rating, synthetic bags perform better when wet. (Yes, the Achilles heel of down is that it loses all insulating properties when wet.) If your trips take you to wet climates, you may want to consider a synthetic bag for this reason alone. Keep in mind, too, that many people are allergic to down--synthetic bags are non-allergenic. Finally, down is considerably more expensive than synthetic, which might tip the balance for adventurers on a budget.

Bags for All Shapes
Sleeping bags come in two basic shapes that reflect their intended use. Mummy-shaped bags offer the best warmth because they conform to the body's contours. This minimizes the amount of body heat the body must put out to maintain a constant temperature. Many mummy bags are offered in women-specific shapes and sizes, as well. Rectangular bags, while they do offer more room to toss and turn, are less thermally efficient because they contain more open air space. Also, they are typically heavier than mummy bags, and are generally not offered with down insulation, making them best suited for car camping or short backpacking trips.

Pad Yourself
No matter what kind of bag you choose, a sleeping pad is a required accessory. Not only do they provide much-needed comfort when sleeping on the ground, pads also offer crucial warmth for your backside, as the weight of your body compresses--and renders virtually useless--the sleeping bag insulation that lies beneath you.

Customer Review: Great for the kids!
I purchased 2 for my 6 year old nephew. Colors are great, quality of fabric is nice. Light weight and compact as far as bags of this style go. Roomy and snuggly warm for the kids. Perfect for weekend camping and overnights in a tent which was the intent of the purchase.
Customer Review: Nice cold weather sleeping bag
I've bought two of this model. They work real well for cold weather camping. Most of my cold weather camping is with the boy scouts in igloos and snow caves. I've sleep on multiple occasions where it has been 10-20 degrees outside, probably 30 degrees where I'm sleeping and I've been cozy. The only compliant I have is the zipper catches on the inside baffle. My other summer Slumberjack sleeping bag has a larger zipper and doesn't catch. My summer bag is now 25 years old and still looks and works great. I'm hoping this model lasts just as long.

Part of Slumberjack's Grand Canyon line of sleeping bags, the oversized, rectangular Esplanade sleeping bag is a great choice for state park trekkers--whether camping in a tent, an RV, or car. The full-length insulated draft tube with anti-snag zippers seals out the cold. Rated to 0 degrees Fahrenheit, it offers a double-layer offset construction with a differential cut that allows insulation to loft fully. Other features include easy-grab pull tabs, an adjustable storm collar, and an internal media pocket for storing your iPod. It has a durable polyester hex ripstop exterior construction and comfortable polyester/cotton blend liner. It comes with a compression stuff sack. This bag can be machine washed and hung to dry.

It's filled with Slumberloft HQ, a synthetic fiber composed of a 50 percent hollow core polyester fiber joined with a 50 percent solid core polyester fiber, providing great warmth and loft at a great price.

• Construction: Double layer offset construction with differential cut
• Outer: Polyester hex ripstop
• Liner: Polyester cotton
• Size: 34 by 84 inches
• Maximum user height: 5 feet 11 inches
• Fill Weight: 4 pound 7 ounces
• Carry Weight: 6 pounds 11 ounces
• Carry Size: 11 by 20 inches
• Color: Reflex Blue / Morning Sun / Black / Charcoal

About Slumberjack
Slumberjack has been known as the outdoor sleep expert or for more than 50 years. They have built this reputation for being the best by building the finest quality sleeping systems in the world, while addressing the needs of virtually all market segments from backpacking and trekking to family camping and hunting and fishing. With over five decades of experience in the industry, Slumberjack has taught everyone that "roughing it" doesn't have to mean being uncomfortable. That's why their selection of sleeping bags, self-inflating mats, self-inflating chairs, camp furniture, bivy shelters, and accessories offers a choice for every season and a fit for nearly every size and shape.

Amazon.com Sleeping Bag Guide
Sleep Well: Finding the Right Sleeping Bag
Sleeping bag technology has come a long way from the days of cowboy bedrolls. These days, there are a number of high-tech materials and designs available to keep you warm during the coldest outings. Here's a short list of things to keep in mind when you're shopping for a bag:

Buy for Cold
It's a safe bet that on at least one of your adventures, the nighttime temperature will drop unexpectedly. That's why it's smart to buy a bag that's rated for the lowest possible temperature you expect to face on your camping and backpacking trips. For summer trips, a bag rated at +35 degrees or higher will likely do the trick. If you like to camp in higher elevations in the summer, or if spring and fall outings are in your future, consider bags rated from +10 to +35. Winter adventurers should look for bags in the -10 to +10 range, while those on serious winter alpine climbs and expeditions will want a bag rated lower than -10.

Keep in mind that sleeping bag manufacturers' temperature ratings only estimate the minimum temperature at which the bag will provide warmth. Take these numbers with a grain of salt, as different folks generate different amounts of heat when they sleep. If you're the type who likes to pile on the covers even on warmer nights, go for a bag that's rated ten degrees colder. The opposite is true for "warm" sleepers--a 35-degree bag will probably work for you on a 25-degree night.

Goose or No Goose?
The most important component of any sleeping bag is its insulating material. Modern sleeping bags offer two choices: goose down or synthetic. While both materials have advantages and disadvantages, down bags are considered superior because of their phenomenal warmth-to-weight and warmth-to-bulk ratios. While providing great insulation, down is extremely compressible and light. There's a reason why geese can fly and stay warm through the winter! Down also boasts great long-term durability and will typically retain its insulating properties after years of use.

All of that said, there are many high-quality synthetic bags on the market and synthetic materials are getting better all the time. While a synthetic bag will weigh somewhat more than a down bag at an equivalent temperature rating, synthetic bags perform better when wet. (Yes, the Achilles heel of down is that it loses all insulating properties when wet.) If your trips take you to wet climates, you may want to consider a synthetic bag for this reason alone. Keep in mind, too, that many people are allergic to down--synthetic bags are non-allergenic. Finally, down is considerably more expensive than synthetic, which might tip the balance for adventurers on a budget.

Bags for All Shapes
Sleeping bags come in two basic shapes that reflect their intended use. Mummy-shaped bags offer the best warmth because they conform to the body's contours. This minimizes the amount of body heat the body must put out to maintain a constant temperature. Many mummy bags are offered in women-specific shapes and sizes, as well. Rectangular bags, while they do offer more room to toss and turn, are less thermally efficient because they contain more open air space. Also, they are typically heavier than mummy bags, and are generally not offered with down insulation, making them best suited for car camping or short backpacking trips.

Pad Yourself
No matter what kind of bag you choose, a sleeping pad is a required accessory. Not only do they provide much-needed comfort when sleeping on the ground, pads also offer crucial warmth for your backside, as the weight of your body compresses--and renders virtually useless--the sleeping bag insulation that lies beneath you.

Customer Review: Cold weather bag or intro to mummies
I love this bag when the weather gets cold. I have used it comfortably down to about 15 degrees on a thermal pad with thermals/socks/cap. The rectangular foot is a little harder to heat since it has so much room, but you can stuff in tomorrow's clothes to reduce the air space. It helped me get over the transition from full rectangular to a mummy type bag since I thought I needed the freedom. The oversized bag has good shoulder room for XL guys. I learned that when it gets cold I don't need much leg room. Good for car camping, a little heavy for backpaking.
Customer Review: Great bag
I got this bag because my slumberjack cot was probably the best made cot Ive ever owned and because it was wider then a mummy bag. It looks and feels very solid and For the most part i was very warm considering it was about 20 deg outside and windy. The carrier bag is a bit to small and very hard to get the sleeping bag into. So i may buy a bigger carrier bag soon But over all i am very pleased with this bag and still stand by all slumberjack products.