Top Extreme Cold Weather Rectangular Sleeping Bags


Our review process

Our team has gathered, researched, and analyzed information on plenty of various types of sleeping bags in order to recommend our top rated sleeping bags today. We then further sub-categorized them and looked more specifically at 9 different extreme cold weather rectangular sleeping bags. In our research, we took into consideration a large variety of different key features among the 28,000 different data points and combined it with customer reviews to inform you of the leading extreme cold weather rectangular sleeping bags available on the market. But don't just take our word for it, check out some of the pros and cons of some of the main specs.

We've taken a look at extreme cold weather rectangular sleeping bags and wanted to let you know about them. Rectangular sleeping bags have an incredibly roomy design, so they are suitable for people who feel too claustrophobic by the tight mummy shape. They accommodate varying sleeping positions, so if you move around a lot at night, you'll have the space and freedom to sleep in any position you choose. With double zippers, they are perfect for sleeping two as you can attach two sleeping bags to each other. However, they are quite heavy, so they are less convenient for when weight is the top priority. Additionally, rectangular sleeping bags don't trap and heat the air around your body as well as other designs do, creating more room inside which can weaken the bag's ability to keep you warm.

Preventing any heat loss, extreme cold weather sleeping bags are critical when you're out in the cold for extended periods. They feature zoned insulation, which concentrates insulation at the top of the sleeping bag to seal in all the warm air rising. They have draft tubes, which run behind the zipper to help prevent warm air from escaping. Extreme cold weather sleeping bags are commonly designed with a draft collar, keeping warm air in and cold air out. They are more often than not designed with feather down, so they can trap heat like no other material.

Our Top Ranking Sleeping Bags:
Product NameBrandWeightTemperature RatingSize
Best Overall Score
1
An image of Slumberjack Country Squire 51731412LR Sub Zero Degree Poly Cotton Sleeping Bag
Slumberjack Country Squire 51731412LR Sub Zero Degree Poly Cotton Sleeping Bag
Slumberjack
13
sub zero degree
single
Runner Up
2
An image of Coleman Big Game 2000000100 Men's 0 Degree Cotton Flannel Sleeping Bag
Coleman Big Game 2000000100 Men's 0 Degree Cotton Flannel Sleeping Bag
Coleman
11
0 degree
single
3
An image of Slumberjack Big Timber Pro 0 Degree Flannel Sleeping Bag
Slumberjack Big Timber Pro 0 Degree Flannel Sleeping Bag
Slumberjack
9.1
0 degree
single
4
An image of Big Agnes Whiskey Park Men's 0 Degree Nylon Sleeping Bag
Big Agnes Whiskey Park Men's 0 Degree Nylon Sleeping Bag
Big Agnes
1
0 degree
single
5
An image of Slumberjack Borderland 51724615DZ Men's 0 Degree Sleeping Bag
Slumberjack Borderland 51724615DZ Men's 0 Degree Sleeping Bag
Slumberjack
5.81
0 degree
single
Our Top Ranking Sleeping Bags
Customer Rating
Brand
Slumberjack
Weight
13
Temperature Rating
sub zero degree
Size
single
Customer Rating
Brand
Coleman
Weight
11
Temperature Rating
0 degree
Size
single
Customer Rating
Brand
Slumberjack
Weight
9.1
Temperature Rating
0 degree
Size
single
Customer Rating
Brand
Big Agnes
Weight
1
Temperature Rating
0 degree
Size
single
Customer Rating
Brand
Slumberjack
Weight
5.81
Temperature Rating
0 degree
Size
single
Best Overall Score
An image of Slumberjack Country Squire 51731412LR Sub Zero Degree Poly Cotton Sleeping Bag

With the Slumberjack Country Squire Sub Zero Degree Poly Cotton Rectangular Sleeping Bag, you can experience a great night's sleep while on your outdoor adventure. This Slumberjack sleeping bag has a rectangular shape, allowing you to comfortably sleep on your side, back, or stomach without feeling restricted. It is designed from cotton shell material and features a poly cotton lining, so you can use this material heavily as it is able to withstand continual washings without losing its shape or texture. Withstanding sub-zero degree temperatures, this Slumberjack sleeping bag can seal in warmth even on the most frigid nights. Ideal for winter, it can withstand harsh weather and still keep you warm. It is designed for backpacking, so it is compact and easy to fit in your bag, making it comfortable to carry no matter the hiking trail. This Slumberjack sleeping bag is washable, so you can clean it to make sure your bag stays in the best condition.

    Pros
    • Washable
    • Poly cotton lining is very durable, and fast-drying
    • Cotton shell doesn't absorb heat
    Cons
    • Poly cotton is not good for warm temperatures
    • Rectangular shape is not the warmest option
    • Cotton shell is hard to carry
Runner Up
An image of Coleman Big Game 2000000100 Men's 0 Degree Cotton Flannel Sleeping Bag

Let's review the Coleman Big Game Men's 0 Degree Cotton Flannel Rectangular Sleeping Bag, rated highly by online shoppers. This sleeping bag has a rectangular shape, which is spacious and offers more freedom of movement. Featuring Thermolock technology, it reduces heat loss through the zipper since it has an added layer of insulation along the opening. It features a cotton flannel lining, which has moisture wicking capabilities, drawing wetness away from the body and it is also made with a cotton shell, so you won't overheat, as it's very strong, highly breathable, and doesn't absorb sunlight. Withstanding 0°F temperatures, this sleeping bag can prevent any icy drafts from keeping you up at night.

This sleeping bag has a Fiberlock Construction, which eliminates bunching of the insulation. It works well for camping trips, giving you the necessary protection to comfortably sleep outdoors after the temperatures drop at night. It has a plush bottom, so you can sleep in the outdoors without having to sacrifice a good night's rest. This sleeping bag is machine washable, so you can easily clean it at home to ensure your bag stays in the best condition.

    Pros
    • Machine washable
    • Features a plush bottom
    • Cotton flannel lining allows for airflow
    Cons
    • Rectangular shape is not very insulated
    • Camping sleeping bags are heavier than backpacking bags
    • Cotton exterior is hard to carry
Additional Picks
An image of Slumberjack Big Timber Pro 0 Degree Flannel Sleeping Bag

With a high user rating, the Slumberjack Big Timber Pro 0 Degree Flannel Rectangular Sleeping Bag could be exactly what you need for your next outdoor adventure. This Slumberjack sleeping bag works well for camping trips, offering cozy warmth without adding a lot of weight. It has a rectangular shape, which is perfect for those who like room to stretch out. It features a poly-canvas shell and a flannel lining, which combines wool and other synthetic fibers, making it very cozy and soft on the skin.

This sleeping bag detaches via zippers, so you can easily split your double bag into two individual ones. It features a zipper guard, keeping the material from snagging in the zipper. With a 0°F temperature rating, it can prevent any icy drafts from keeping you up at night. This Slumberjack sleeping bag has Slumberloft™ synthetic insulation, which will keep you warm with the use of polyester fibers.

    Pros
    • Zipper guard prevents the material from catching
    • Flannel lining draws moisture away from the body
    • Rectangular shape is built with extra space
    Cons
    • Flannel tends to shrink
    • Rectangular shape is not the warmest option
    • Camping sleeping bags are not suitable for hiking
An image of Big Agnes Whiskey Park Men's 0 Degree Nylon Sleeping Bag

If you want to get a good night's sleep while taking on the outdoors, you'll want to learn all about the Big Agnes Whiskey Park Men's 0 Degree Nylon Rectangular Sleeping Bag. This Big Agnes sleeping bag has a rectangular shape, which is perfect for those who like a bit of extra room. It has Thermolite Extra material, which is constructed of hollow-core fibers that trap air, which keeps you warmer as your body heat remains inside the sleeping bag. Withstanding 0°F temperatures, this Big Agnes sleeping bag can prevent any cold drafts from keeping you up at night. It has a nylon lining and is made with a nylon ripstop exterior, resisting wear and tear. This Big Agnes sleeping bag is treated for stain resistance, helping you keep it as clean as possible without having to routinely wash it. It features a stuff sack for conveniently fitting your sleeping bag into your backpack with the rest of your equipment.

    Pros
    • Stuff sack will keep your backpack organized
    • Nylon lining will stay at a comfortable temperature
    • Nylon ripstop shell is light and comfortable
    Cons
    • Nylon will pill with extended use
    • Rectangular shape is heavier than other shapes
    • Stuff sack can damage the sleeping bag's insulation if used for too long
An image of Slumberjack Borderland 51724615DZ Men's 0 Degree Sleeping Bag

Use the Slumberjack Borderland Men's 0 Degree Rectangular Sleeping Bag to stay warm and cozy in the outdoors. This Slumberjack sleeping bag has a rectangular shape, so you will have room to move around. It works well for camping trips, offering cozy warmth without adding a lot of weight. Featuring a compressible design, it will not take up all of the usable space in your backpack so you will have enough room to bring along other gear. It has a zipper guard, preventing the material from snagging when opening and closing the zipper. Withstanding 0°F temperatures, this Slumberjack sleeping bag can prevent any cold drafts from keeping you up at night. Featuring a chest pocket, it has a handy spot to store small objects. It has a stuff sack, designed for easily fitting your sleeping bag into your backpack along with the rest of your equipment.

    Pros
    • Designed to compress easily
    • Zipper guard keeps the fabric from snagging
    • Stuff sack provides a place to store small items
    Cons
    • Rectangular shape is heavier than other shapes
    • Camping sleeping bags are more difficult to carry than hiking bags
    • Stuff sack can ruin the sleeping bag's insulation if used for too long
An image of Big Agnes Farwell 0 Degree Nylon Taffeta Sleeping Bag

Before purchasing the Big Agnes Farwell 0 Degree Nylon Taffeta Rectangular Sleeping Bag, it's helpful to learn more about its different features. This sleeping bag has a nylon taffeta lining and is designed with a nylon ripstop exterior, resisting wear and tear. It is perfect for camping, giving you the necessary protection to comfortably sleep outdoors after the temperatures drop at night. This sleeping bag has a rectangular shape, which is great for those who like room to stretch out.

Suitable for temperatures as low as 0°F, this sleeping bag can prevent any cold drafts from keeping you up at night. It detaches via zippers, so you can easily split your double bag into two individual ones. This eco-friendly Big Agnes sleeping bag has Insotect Hotstream, which runs down the length of the sleeping bag, distributing heat vertically and keeping your entire body warm. It has a free-range hood, which gives you the space to lift and comfortably move your head. This Big Agnes sleeping bag has a stuff sack and a mesh storage bag, which will store your bag or other loose items.

    Pros
    • Made from eco-friendly fabrics
    • Free-range hood provides extra cushion by the head
    • Mesh storage bag will hold your bag or other small items
    Cons
    • Rectangular shape is not very insulated
    • Camping sleeping bags are more difficult to carry than hiking bags
An image of Slumberjack Wheeler Lake Men's 0 Degree Sleeping Bag

You'll want to discover more about the Slumberjack Wheeler Lake Men's 0 Degree Rectangular Sleeping Bag to discover what sets it apart from all the other sleeping bags on the market. This Slumberjack sleeping bag has a rectangular shape, which is ideal for those who like room to stretch out. It features a 0°F temperature rating, so the cold can't deter you from spending a night in the wilderness. This Slumberjack sleeping bag has a zipper guard, which prevents snagging by surrounding the zipper with extra material on either side. Perfect for hunting, it will keep you insulated on overnight trips when it gets cold in the woods.

    Pros
    • Zipper guard prevents the fabric from tearing
    • Rectangular shape is easy to roll up and store
    • Single size sleeping bags are well insulated
    Cons
    • Rectangular shape is not very insulated
An image of Coleman Aspen Meadows 2000018118 Men's 0 Degree Sleeping Bag

With the Coleman Aspen Meadows Men's 0 Degree Rectangular Sleeping Bag, you can experience an incredible night's sleep while on your outdoor adventure. This sleeping bag has a polyester exterior, which is light and comfortable. It has a rectangular shape, so you will have plenty of room to move around in your sleep. Ideal for camping, it gives you insulation to comfortably sleep outdoors after the temperatures drop at night. It has Thermotech insulation, which is a non-toxic, highly insulated, moisture-absorbent foam that is used to trap heat inside the sleeping bag. This Coleman sleeping bag can be machine washed and has a zipper guard, preventing the material from snagging in the zipper. It has roll control, is easy to pack, and has a quick cord, which is a no-tie mechanism making it simple to fold. This sleeping bag can withstand 0°F temperatures, so the cold won't deter you from spending a night in the wilderness.

    Pros
    • Can be machine washed
    • Roll control tab keeps the sleeping bag straight
    • Zipper guard prevents the material from snagging
    Cons
    • Rectangular shape is not the warmest option
    • Camping sleeping bags are more difficult to carry than backpacking bags
    • Polyester exterior is not very durable
An image of Browning Acadia 4853337 Men's 0 Degree Microfiber Sleeping Bag

With the Browning Acadia Men's 0 Degree Microfiber Rectangular Sleeping Bag, you can experience an incredible night's sleep while on your outdoor adventure. This Browning sleeping bag has a rectangular shape, allowing you to comfortably sleep on your side, back, or stomach without feeling restricted. It has Techloft Micro-Insulation, so you will have maximized insulation and warmth because of tiny, silicone-coated, micro-denier fibers. With a 0°F temperature rating, it can prevent any cold drafts from keeping you up at night. It features a microfiber lining and a nylon ripstop exterior, which will resist wear and tear and potential holes or rips. This Browning sleeping bag works well for camping trips, offering cozy warmth without adding a lot of weight. It has a compressible design and is made to be compact, so it can be rolled up small, fitting conveniently wherever you tale it. It features a stuff sack, which will make packing up your bag super easy.

    Pros
    • Folds up compactly, helping you get rid of unnecessary bulk
    • Features a compressible design
    • Stuff sack will keep your backpack organized
    Cons
    • Rectangular shape is bulkier than other shapes
    • Camping sleeping bags are not suitable for backpacking
    • Stuff sack can damage the sleeping bag's insulation if used for too long
If You Need Help Making Your Choice, Here's Some Additional Information About Extreme Cold Weather Rectangular Sleeping Bags:
What Temperature Ratings Are Available for Rectangular Sleeping Bags?
Sub Zero Degree Sleeping Bags

If you want a sleeping bag that will keep you warm in freezing temperatures then sub zero degree sleeping bag might be what you want. We compared eight rectangular sleeping bags available with a sub zero degree temperature rating. Sub zero degree sleeping bags have a tight fitted hood design, so your neck and head will be enveloped in warmth. They are ideal for winter camping, so they make it really easy for a person to stay comfortable in freezing temperatures. They come with a quick-drying technology, so they are engineered to keep you warm even in the wettest conditions. With advanced technology like Thermotech insulation, these sleeping bags are engineered to deliver outstanding warmth. They have an easy access design, so you don't have to struggle with the zipper while staying out in the cold. Now that you know about sub zero degree rating sleeping bags, check out this great rectangular sleeping bag. One downside is that they are generally expensive, so if you won't be using the bag that often, you might want to consider purchasing a cheaper one.

0 Degree Sleeping Bags

If you're looking for a 0 degree rating rectangular sleeping bag, then you should take a look at this great sleeping bag. These 0 degree sleeping bags should keep you comfortable down to 0°F, but remember that this doesn't account for variables such as layering, what you're wearing, and various other factors. With advanced technology like Thermotech insulation, they are engineered to provide extremely insulated air between you and the cold outside. They are ideal for winter camping, so you won't have to worry about having to pack tons of extra blankets and layers to stay warm. Something to keep in mind is that they are generally expensive, so unless you're planning on taking on very extreme weather, they might not be worth your purchase. 0 degree sleeping bags have an easy access design, so you don't have to struggle with the zipper while dealing with cold weather.

These Are Some of the Liner Materials to Keep in Mind for Rectangular Sleeping Bags
Flannel Sleeping Bags

Are flannel sleeping bags the right choice for you? Take a look at this particular rectangular sleeping bag with a flannel liner that we highly recommend. Flannel sleeping bags are easy to clean, so you can keep them in great shape with just soap and water. Perfect for chilly nights in the woods, they will keep you snug and cozy. They are very comfy, ensuring your child receives a good night's sleep after a long day in the outdoors. These flannel sleeping bags are moisture wicking, keeping you dry in high humidity conditions.

Poly Cotton Sleeping Bags

Are poly cotton sleeping bags the right choice for you? Take a look at this particular rectangular sleeping bag with a poly cotton liner that we highly recommend. These sleeping bags are extremely durable, so they will not pill or fray with extended use. Made with breathable material, they won't stick to your skin or leave you feeling overheated on warmer nights. They are easy to clean, so they can last a long time before needing a complete wash. Poly cotton sleeping bags dry quickly, so even in the wettest conditions, they hardly absorb any moisture.

Cotton Flannel Sleeping Bags

Looking for a durable sleeping bag? A sleeping bag with a cotton flannel liner may be the solution you want. For your convenience, we recommend one of the great rectangular sleeping bags that come with a cotton flannel liner. Cotton flannel sleeping bags are designed to be hypoallergenic, so they don't contain harmful substances that can cause discomfort for people with asthma or certain chemical sensitivities. They are very comfortable, so you can get a good night's sleep after a long day in the outdoors. They are designed for warmth, so cold temperatures won't keep you from an epic outdoor adventure. They are extremely durable, so you can go years before having to replace them. Now that you know more about cotton flannel, choose the right one for you here.