Unbiased Men's 40 Degree Sleeping Bags Review


Our review process

Our team has collected, researched, and analyzed information on over 800 various kinds of sleeping bags in order to show you our highest ranked sleeping bags on the market. We then further sub-categorized them and looked more specifically at 13 different men's 40 degree sleeping bags. In our research, we took into consideration a range of different main features among the 28,000 different data points and combined it with customer reviews to inform you of the top men's 40 degree sleeping bags available today. But don't just take our word for it, check out some of the pros and cons of some of the main specs.

Our article will pinpoint the key factors to consider when buying a men's 40 degree sleeping bag. Starting at a length of 6 ft., men's sleeping bags are designed to give men a comfortable and roomy fit. However, they are less insulated than women's sleeping bags, so you'll need to choose one that is appropriately sized to maximize heat efficiency. They should keep you comfortable down to 40°F. 40 degree sleeping bags are generally cheaper than sub-zero degree bags, so you can buy one without feeling worried about going above your budget. They open completely, allowing you to unzip them for ventilation on warm nights. These sleeping bags are great for warm weather trips, so they help vent heat, keeping you cool if a hot front comes through. They are typically lighter, so although they don't protect against the most extreme weather they are easier to pack and will contribute to less overall weight you have to carry.

Our Top Ranking Sleeping Bags:
Product NameBrandShapeSize
Best Overall Score
1
An image of Slumberjack Boundary 51726215LL Men's 40 Degree Polyester Taffeta Sleeping Bag
Slumberjack Boundary 51726215LL Men's 40 Degree Polyester Taffeta Sleeping Bag
Slumberjack
mummy
single
Runner Up
2
An image of Sierra Design Cloud 800 Men's 40 Degree Nylon Ripstop Sleeping Bag
Sierra Design Cloud 800 Men's 40 Degree Nylon Ripstop Sleeping Bag
Sierra Design
mummy
single
For Cold Weather
3
An image of Sea to Summit Ember I 073R-Parent Men's 40 Degree Nylon Sleeping Bag
Sea to Summit Ember I 073R-Parent Men's 40 Degree Nylon Sleeping Bag
Sea to Summit
barrel
single
Best Affordable Option
4
An image of Slumberjack Latitude Lat40 Men's 40 Degree Sleeping Bag
Slumberjack Latitude Lat40 Men's 40 Degree Sleeping Bag
Slumberjack
mummy
single
For Backpacking
5
An image of Marmot Voyager 45 Men's 40 Degree Sleeping Bag
Marmot Voyager 45 Men's 40 Degree Sleeping Bag
Marmot
mummy
Our Top Ranking Sleeping Bags
Customer Rating
Brand
Slumberjack
Shape
mummy
Size
single
Customer Rating
Brand
Sierra Design
Shape
mummy
Size
single
Customer Rating
Brand
Sea to Summit
Shape
barrel
Size
single
Customer Rating
Brand
Slumberjack
Shape
mummy
Size
single
Customer Rating
Brand
Marmot
Shape
mummy
Size
Best Overall Score
An image of Slumberjack Boundary 51726215LL Men's 40 Degree Polyester Taffeta Sleeping Bag

With an excellent user rating, the Slumberjack Boundary Men's 40 Degree Polyester Taffeta Mummy Sleeping Bag might be just what you need for your next outdoor adventure. This sleeping bag has a mummy shape, which is larger on top and more fitted on the bottom, keeping warm air closer to you. It has a polyester taffeta lining and a polyester exterior, which is breathable and comfortable. It is ideal for temperatures around 40°F, keeping you warm on chilly summer nights. This sleeping bag has Slumberloft™ synthetic insulation, which uses polyester fibers to create a high level of insulation. It features a stuff sack for easily fitting your sleeping bag into your backpack with the rest of your equipment.

    Pros
    • Stuff sack stores sleeping bags compactly
    • Polyester taffeta lining is naturally UV-resistant
    • Polyester shell is durable and colorfast
    Cons
    • Mummy shape has a tailored cut which can be too cramped for some
    • Polyester shell is not so durable
    • Stuff sack can damage the sleeping bag's filling if used for too long
Runner Up
An image of Sierra Design Cloud 800 Men's 40 Degree Nylon Ripstop Sleeping Bag

With the Sierra Design Cloud 800 Men's 40 Degree Nylon Ripstop Mummy Sleeping Bag, you can experience an incredible night's sleep while on your trip. This Sierra Design sleeping bag has a mummy shape, sealing in your body heat since it is tight fitting. It is made for camping, offering cozy warmth and good compressibility. It features a nylon ripstop lining and is made with a nylon ripstop exterior, so it resists wear and tear.

This 3 season Sierra Design sleeping bag is best suited for summer, spring and fall trips. This sleeping bag can withstand 40°F temperatures and is waterproof, making it a good choice for wet environments. It includes a shoulder pocket, so you can stash your valuable and small possessions, such as your watch. This sleeping bag uses Dridown technology, so the insulating down clusters will be protected from moisture.

    Pros
    • Nylon ripstop lining resists tearing
    • Nylon ripstop shell is light and comfortable
    • Mummy shape is excellent for backpacking
    Cons
    • Mummy shape limits sleeping positions
    • Camping sleeping bags are not suitable for hiking
    • 3 season sleeping bags can not be used all year
For Cold Weather
An image of Sea to Summit Ember I 073R-Parent Men's 40 Degree Nylon Sleeping Bag

Trying to find a sleeping bag to take with you on the hiking trail? You'll want to know about the Sea to Summit Ember I Men's 40 Degree Nylon Barrel Sleeping Bag. This sleeping bag has a nylon lining, which will feel light and soft and will remain at a comfortable temperature, and a nylon ripstop exterior, which is hypoallergenic, repelling allergens to keep you allergy free. It is lightweight and works well for backpacking trips, so it is compact and easy to fit in your pack, making it comfortable to carry no matter the distance. It has a barrel shape, which is wider on the top and more loosely tapered by the feet, keeping you nice and warm while still giving you enough room to move around in your sleep. This sleeping bag features a 40°F temperature rating, which is great for warm weather nights. Featuring a compressible design, it fits easily into a hiking backpack or overnight bag. It is easy to pack and has a compression bag and a laundry bag for conveniently holding all of your dirty clothes until the end of your trip.

    Pros
    • Features a compressible design
    • Easy to pack sleeping bags roll up compactly
    • Lightweight build
    Cons
    • Nylon can fade easily
    • Barrel shaped sleeping bags can be hard to fit into a backpack
Best Affordable Option
An image of Slumberjack Latitude Lat40 Men's 40 Degree Sleeping Bag

Looking for a great camping sleeping bag? You'll want to hear all about the Slumberjack Latitude Men's 40 Degree Mummy Sleeping Bag. Featuring a mummy shape, this Slumberjack sleeping bag is tight fitting to prevent warm air from escaping. It works well for camping trips, giving you the necessary protection to comfortably sleep outdoors after the temperatures drop at night. This sleeping bag features a 40°F temperature rating, which is ideal for warm weather nights. It has a zipper guard, preventing the material from snagging when opening and closing the zipper. It comes with a stuff sack, which takes up hardly any space and will make packing your bag so much easier. This sleeping bag has Slumberloft™ synthetic insulation, which will keep you warm with the use of polyester fibers.

    Pros
    • Zipper guard keeps the fabric from tearing
    • Stuff sack provides a spot to stash small items
    • Mummy shape has excellent insulation
    Cons
    • Mummy shape has a tight fit which can be uncomfortable for some people
    • Camping sleeping bags are not suitable for backpacking
    • Stuff sack can damage the sleeping bag's filling if used for too long
For Backpacking
An image of Marmot Voyager 45 Men's 40 Degree Sleeping Bag

Trying to find a sleeping bag on a budget? You'll want to know about the Marmot Voyager 45 Men's 40 Degree Mummy Sleeping Bag. With a mummy shape, this Marmot sleeping bag is fitted to prevent warm air from escaping. It features Spirafil insulation, which mixes large, hollow fibers with small, polyester fibers to create a blend of durability, warmth, and comfort. This sleeping bag can withstand 40°F temperatures and is waterproof, making it a good fit for wet environments. It has a polyester shell, which will resist UV light, protecting you from harmful sunlight.

With a mummy style, the hood will keep your head and neck extremely warm, since the cut leaves only your mouth and nose exposed. This Marmot sleeping bag features a compressible design, leaving you enough extra space to take along your other essentials. It is perfect for hiking, so if you don't want to carry a lot of weight this could be a great choice for you. This sleeping bag has a stuff sack and features a two-way zipper, so you can easily control the temperature while you sleep.

    Pros
    • Made to compress easily
    • Mummy-style hood traps body heat
    • Two-way zipper provides airflow by your feet
    Cons
    • Mummy shape is only suitable for back sleepers
    • Polyester exterior is not very durable
Additional Picks
An image of Snugpak Special Forces 1 91125MC Men's 40 Degree Paratex Light Sleeping Bag

With a high user rating, the Snugpak Special Forces 1 Men's 40 Degree Paratex Light Mummy Sleeping Bag could be exactly what you need for your next trip. This Snugpak sleeping bag has a mummy shape, sealing in your body heat since it is very fitted. It features a Paratex light lining and a paratex shell, which is a ripstop fabric that has a hydrophilic polyurethane coating, making it 100% waterproof. It features a compressible design and is made to be compact, so it can be rolled up small, fitting conveniently wherever you pack it. Perfect for military use, it is made to keep you warm and comfortable in even the roughest terrain. This Snugpak sleeping bag has a 40°F temperature rating, which is ideal for warm weather nights. It has a stuff sack for conveniently fitting your sleeping bag into your backpack along with the rest of your gear.

    Pros
    • Folds up compactly
    • Made to compress easily
    • Stuff sack will keep your pack organized
    Cons
    • Mummy shape is close fitting with no extra room to move
    • Stuff sack can ruin the sleeping bag's filling if used for too long
An image of Big Agnes Buffalo Park Men's 40 Degree Sleeping Bag

Get ready for your next outdoor adventure with the Big Agnes Buffalo Park Men's 40 Degree Barrel Sleeping Bag. This sleeping bag has a barrel shape, which is tapered from top to bottom, increasing thermal efficiency while still giving you a comfortable amount of room to move around. It uses Thermolite Extra material, so you will stay warmer and drier as the hollow-core fibers of the fabric keep your body heat inside the sleeping bag. Perfect for camping, this Big Agnes sleeping bag gives you insulation to comfortably sleep outdoors after the temperatures drop at night. It can withstand 40°F temperatures, keeping you warm on colder summer nights.

    Pros
    • Barrel shape improves warmth
    • Single size sleeping bags are well insulated
    • Thermolite Extra material, which has excellent insulation
    Cons
    • Barrel shaped sleeping bags can let cool air in
    • Camping sleeping bags are not suitable for hiking
An image of Coleman Sunridge Men's 40 Degree Polyester Sleeping Bag

Looking for an affordable sleeping bag? You'll want to know all about the Coleman Sunridge Men's 40 Degree Polyester Rectangular Sleeping Bag. This sleeping bag has a rectangular shape, which is great for those who like room to stretch out. It can withstand 40°F temperatures, keeping you warm on chilly summer nights. It features a polyester exterior, which is light and comfortable, and a polyester lining, which is light and soft on your skin and does not get as hot as other fabrics during the night. This sleeping bag features a zipper guard, preventing the fabric from snagging when opening and closing the zipper. Made for camping, it gives you insulation to comfortably sleep outdoors after the temperatures drop at night. It has roll control and is made to be easy to pack, so it can be folded into a practical size to save space in your bag.

    Pros
    • Roll control tab keeps the sleeping bag straight
    • Zipper guard prevents the material from ripping
    • Polyester lining is durable and colorfast
    Cons
    • Polyester can get dirty easily
    • Rectangular shape is not the warmest option
    • Camping sleeping bags are not suitable for hiking
An image of Coleman Big Basin 2000012422 Men's 40 Degree Polyester Sleeping Bag

Choose the Coleman Big Basin Men's 40 Degree Polyester Mummy Sleeping Bag to stay warm in the outdoors. This Coleman sleeping bag features a polyester lining, which is light and comfortable on your skin and doesn't heat up as much as other fabrics once you're inside, and a polyester exterior, which is light and comfortable. It has a mummy shape, which is larger on top and more tapered on the bottom, keeping warm air close to your body. Made for camping, it gives you the necessary protection to comfortably sleep outdoors after the temperatures drop at night. It features a 40°F temperature rating, keeping you warm on chilly summer nights. This 3 season Coleman sleeping bag is best suited for summer, spring and fall trips.

    Pros
    • Polyester lining is durable and colorfast
    • Polyester shell resists UV rays
    • Mummy shape has high insulation
    Cons
    • Polyester traps moisture inside the sleeping bag
    • Mummy shape requires you to sleep on your back
    • Camping sleeping bags are not suitable for backpacking
An image of Marmot Voyager 45 900718-2772 Men's 40 Degree Polyester Sleeping Bag

With the Marmot Voyager 45 Men's 40 Degree Polyester Mummy Sleeping Bag, you can experience a great night's sleep while on your outdoor adventure. This sleeping bag has a mummy shape, which is wider on top and more fitted on the bottom, keeping warm air closer to you. It has a polyester shell, which deflects UV light, preventing the color from fading, and a polyester lining, which is breathable and comfortable and doesn't heat up as much as other materials once you're inside. This sleeping bag is ideal for temperatures around 40°F and is waterproof, making it a good choice for rainy environments. It features Spirafil insulation, which mixes large, hollow fibers with small, polyester fibers to create a blend of durability, warmth, and comfort. Perfect for hiking, it won't add noticeable weight to your bag while you're taking on the outdoors. Featuring a compressible design, it will fold up compactly, leaving you enough space for all your other gear. This Marmot sleeping bag comes with a two-way zipper and a stuff sack, which will keep you organized.

    Pros
    • Designed to compress easily
    • Stuff sack provides a spot to store small items
    • Polyester lining is durable and colorfast
    Cons
    • Polyester stains easily
    • Mummy shape limits different sleeping positions
    • Polyester exterior is not very durable
What Else to Look For When Buying Your Next Men's 40 Degree Sleeping Bag:
Season Options for Men's 40 Degree Sleeping Bags
3 Season Sleeping Bags

Do you like camping outside in the summer, spring, and fall but prefer to stay indoors in the winter months? Check out this awesome one. 3 season sleeping bags can keep you warm in most conditions, except for when there is frost or snow on the ground, so they are a very practical option for those who know they won't be taking on hiking or camping excursions where sub-zero protection is a must. They have enough insulation for colder weather camping trips in spring through to autumn, which provides you with the comfort and warmth you need for sleeping outside during almost every season.

4 Season Sleeping Bags

Passionate about camping outdoors even during the winter months? There is one men's 40 degree sleeping bag available providing weather protection for every season. 4 season sleeping bags come with an insulated hood that can be cinched in, which increases the overall heat efficiency. Suitable for use in all four seasons, they are engineered to keep you warm in very cold environments. However, they come with more expensive price tag than 2 or 3 season sleeping bags, which may only be worth considering if you're looking to make more of a long-term investment. Now that you are better informed about 4 season sleeping bags, check out this great men's 40 degree sleeping bag.

Men's 40 Degree Sleeping Bags Come in the Following Shapes
Barrel Sleeping Bags

Trying to choose the ideal barrel sleeping bag for your next outdoor adventure? We'll help you make your decision by giving you the information that you need. Barrel sleeping bags have a spacious design, so they are ideal for people who feel too claustrophobic by the tight mummy shape. They accommodate varying sleeping positions, making them ideal for people who are particular about sleeping in certain positions such as their sides or stomach. They are cut a bit closer than rectangular bags, so they are a great choice for something spacious while not compromising warmth. Decided on which shape is a good choice for you? Then have a look at this fantastic product.

Rectangular Sleeping Bags

Trying to pick the most suitable rectangle sleeping bag for you? We can help you make an informed choice by giving you the pros and cons. Rectangular sleeping bags have a super roomy design, so they are ideal for people who feel too confined 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, rectangular sleeping bags are perfect for a cozy night of sleeping for two as you can attach two sleeping bags to each other. Something to keep in mind is that they are quite heavy, so they are less suitable for when weight is the top priority. Another downside is that they are less ideal for cold weather, creating more room inside which can weaken the bag's ability to keep you warm. Think you know which shape is perfect for you? Then why not start by looking at this exciting product.

Mummy Sleeping Bags

Are you looking to purchase a new sleeping bag to enhance warmth? We have two mummy sleeping bags available. Click here to have a look at one now. These sleeping bags weigh less than rectangular bags, so you won't have to sacrifice some warmth for weight. Ideal for cold weather, they create a snug and tight fit that helps trap body heat and keep you warm. Something to keep in mind is that they provide less space to move around, making them uncomfortable for sleepers who toss and turn.

These Are Some of the Liner Materials to Keep in Mind for Men's 40 Degree Sleeping Bags
Polyester Sleeping Bags

There is only one men's 40 degree sleeping bag that has a polyester liner. These sleeping bags are designed to be hypoallergenic, so they are ideal for those with allergy sensitivities. They are easy to clean, so they can last a long time before needing a complete wash. They are made with breathable material, providing a cool solution for warmer nights. They are designed with durable materials, so they will not unravel or tear with extended use. They dry quickly, so when facing wet conditions, they hardly absorb any moisture. Feel ready to decide on the right men's 40 degree sleeping bag for you? You can get started here.

Down Sleeping Bags

There is only one men's 40 degree sleeping bag that has a down liner. Down sleeping bags have an easily compressible design, so they don't require a substantial amount of storage space when you are finished using it. They are designed to be insulated, so they trap your body heat very well, keeping you warm regardless of the weather. They are designed for warmth, providing you with a cozy space to take on chilly nights in the outdoors. They are extremely durable, so you can go years before having to replace them. They are very comfortable, so you don't have to suffer sleeping in the outdoors. They are made with breathable material, so heat is distributed evenly, making them great for unpredictable weather. Now that you know more about down, choose the right one for you here.

Nylon Ripstop Sleeping Bags

Looking for a warm sleeping bag? A sleeping bag with a nylon ripstop liner may be the best solution. To help you in your decision, we recommend one of the great men's 40 degree sleeping bags that come with a nylon ripstop liner. Nylon ripstop sleeping bags are made with breathable material, so heat is distributed evenly, making them great for unpredictable weather. They are extremely durable, so you can go years before having to replace them. They are moisture wicking, allowing you a better night's sleep in more humid conditions. Now that you know more about nylon ripstop, take a look here.