Top 40 Degree Polyester Sleeping Bags for 2019


Our review process

We have gathered, researched, and analyzed information on plenty of various kinds of sleeping bags in order to show you our highest scoring sleeping bags on the market. We then further sub-categorized them and looked more specifically at 7 different 40 degree polyester sleeping bags. In our research, we took into consideration a variety of different main features among the 28,000 different data points and combined it with customer reviews to inform you of the top 40 degree polyester sleeping bags available on the market. But don't just take our word for it, check out some of the advantages and disadvantages of some of the main specs.

Thinking about getting a 40 degree polyester sleeping bag? This article highlights the key things you should know. These sleeping bags should keep you comfortable down to 40°F. They are perfect for warm weather trips, so they help vent heat, keeping you cool if a hot front comes through. 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, so they allow you to unzip them for ventilation on warm nights. These sleeping bags are typically lighter, so they might not provide the highest degree of insulation, but they make up for it in weight.

With great breathability, polyester sleeping bags won't stick to your skin or make you feel overheated on warmer nights. They are extremely durable to withstand wear and tear. Polyester sleeping bags are naturally hypoallergenic, so they are ideal for those with allergy sensitivities. They dry quickly, reducing the overall amount of water trapped and absorbed by the material.

Our Top Ranking Sleeping Bags:
Product NameBrandWeightShapeDimensionsSize
Best Overall Score
1
An image of Coleman Girls 40 Degree Polyester Sleeping Bag
Coleman Girls 40 Degree Polyester Sleeping Bag
Coleman
3.5
rectangle
5 ft. 5 in.
single
Runner Up
2
An image of Coleman Sunridge Men's 40 Degree Polyester Sleeping Bag
Coleman Sunridge Men's 40 Degree Polyester Sleeping Bag
Coleman
4.32
rectangle
5 ft. 11 in.
single
For Cold Weather
3
An image of Coleman Big Basin 2000012422 Men's 40 Degree Polyester Sleeping Bag
Coleman Big Basin 2000012422 Men's 40 Degree Polyester Sleeping Bag
Coleman
4.41
mummy
single
Best Affordable Option
4
An image of Marmot Voyager 45 900718-2772 Men's 40 Degree Polyester Sleeping Bag
Marmot Voyager 45 900718-2772 Men's 40 Degree Polyester Sleeping Bag
Marmot
1.81
mummy
single
For Backpacking
5
An image of Marmot NanoWave 45 21480-6278-L 40 Degree Polyester Sleeping Bag
Marmot NanoWave 45 21480-6278-L 40 Degree Polyester Sleeping Bag
Marmot
2.2
mummy
6 ft. 6 in.
single
Our Top Ranking Sleeping Bags
Customer Rating
Brand
Coleman
Weight
3.5
Shape
rectangle
Dimensions
5 ft. 5 in.
Size
single
Customer Rating
Brand
Coleman
Weight
4.32
Shape
rectangle
Dimensions
5 ft. 11 in.
Size
single
Customer Rating
Brand
Coleman
Weight
4.41
Shape
mummy
Dimensions
Size
single
Customer Rating
Brand
Marmot
Weight
1.81
Shape
mummy
Dimensions
Size
single
Customer Rating
Brand
Marmot
Weight
2.2
Shape
mummy
Dimensions
6 ft. 6 in.
Size
single
Best Overall Score
An image of Coleman Girls 40 Degree Polyester Sleeping Bag

If you're looking to buy a sleeping bag for your children, you will want to consider the highly rated Coleman Girls 40 Degree Polyester Rectangular Sleeping Bag. This Coleman sleeping bag is made for girls, featuring a stylish design while keeping your children comfortable and warm. It has a rectangular shape, so kids will have room to move around in their sleep. It has a polyester shell, which is light and comfortable, and a polyester lining, which is a synthetic fabric that is very strong and vibrant.

This Coleman sleeping bag features a 40°F temperature rating, which is great for warm weather nights. It is perfect for camping, giving your kids the necessary protection to comfortably sleep outdoors after the temperatures drop at night. Made with Thermolock technology, it prevents heat loss through the zipper since it has an extra layer of insulation along the opening. It features a stuff sack for conveniently fitting your kid's sleeping bag into their backpack along with the rest of their equipment. It features a zipper guard, preventing the fabric from getting caught when opening and closing the zipper.

    Pros
    • Zipper guard prevents the fabric from tearing
    • Stuff sack will keep your backpack organized
    • Polyester lining is strong and colorfast
    Cons
    • Polyester can stain easily
    • Rectangular shape is heavier than other shapes
    • Camping sleeping bags are bulkier than backpacking bags
Runner Up
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
For Cold Weather
An image of Coleman Big Basin 2000012422 Men's 40 Degree Polyester Sleeping Bag

You'll want to discover more about the Coleman Big Basin Men's 40 Degree Polyester Mummy Sleeping Bag to discover what sets it apart from all the other sleeping bags on the market. With a mummy shape, this Coleman sleeping bag is tight fitting to prevent warm air from escaping. It features a polyester lining, which is light and soft on your skin and does not get as hot as other materials during the night, and a polyester exterior, which is breathable and comfortable. This 3 season Coleman sleeping bag is best suited for summer, spring and fall trips. It features a 40°F temperature rating, keeping you warm on chilly summer nights. This sleeping bag works well for camping trips, offering cozy warmth and good compressibility.

    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
Best Affordable Option
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 an incredible 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 a synthetic fabric that is very durable and vibrant. This sleeping bag is ideal for temperatures around 40°F and is waterproof, making it a good choice for rainy environments. It has Spirafil insulation, which combines large, hollow fibers with small, polyester fibers to create a blend of loft, warmth, and softness. 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
For Backpacking
An image of Marmot NanoWave 45 21480-6278-L 40 Degree Polyester Sleeping Bag

Let's review the Marmot NanoWave 45 40 Degree Polyester Mummy Sleeping Bag, a popular choice among online shoppers. Featuring a mummy shape, this sleeping bag is tight fitting to prevent warm air from escaping. It has a polyester exterior and a polyester lining, which is a synthetic material that is very strong and vibrant. This sleeping bag features Spirafil insulation, which combines large, hollow fibers with small, polyester fibers to create a blend of loft, warmth, and comfort. It is ideal for backpacking and is lightweight, making long days out on the trail easier to tackle. With a compressible design, it will not take up all the space in your bag so you will have sufficient room to bring along other equipment. This Marmot sleeping bag has a zipper guard, keeping the fabric from snagging when opening and closing the zipper. It features a stuff sack for conveniently fitting your sleeping bag into your backpack along with the rest of your gear. This sleeping bag is ideal for temperatures around 40°F, keeping you warm on chilly summer nights. It detaches via zippers, so you can easily transform your double bag into two individual ones.

    Pros
    • Made to compress easily
    • Zipper guard prevents the material from catching
    • Stuff sack provides space to store small items
    Cons
    • Polyester absorbs sweat
    • Mummy shape is close fitting with no extra space to move
    • Polyester exterior is not very durable
Additional Picks
An image of Coleman Willow Creek 2000004446 40 Degree Polyester Sleeping Bag

Choose the Coleman Willow Creek 40 Degree Polyester Rectangular Sleeping Bag to stay warm in the outdoors. This sleeping bag has a rectangular shape, which is spacious and offers more freedom of movement. It is ideal for camping, giving you the necessary protection to comfortably sleep outdoors after the temperatures drop at night. It has a polyester shell, which will deflect UV light, preventing the color from fading, and a polyester lining, which is a synthetic material that is very strong and vibrant.

This Coleman sleeping bag can withstand 40°F temperatures, keeping you warm on colder summer nights. It is machine washable, so you can easily clean it at home to make sure your bag stays in the best condition. This sleeping bag features a plush bottom, so you won't feel the bumps on the ground beneath you. It uses ComfortSmart technology, so it includes various comfort and convenience features such as zipper technology and added cushioning around your head. This sleeping bag features a roll control tab and a quick cord for convenient one-person packing.

    Pros
    • Machine washable
    • Features a plush bottom
    • Quick cord designed for quick one-person packing
    Cons
    • Polyester traps moisture inside the sleeping bag
    • Rectangular shape is not very insulated
    • Camping sleeping bags are more difficult to carry than backpacking bags
An image of Coleman Autumn Glen 40 Degree Polyester Sleeping Bag

Get a good night's sleep while using the Coleman Autumn Glen 40 Degree Polyester Rectangular Sleeping Bag. This Coleman sleeping bag has a rectangular shape, allowing you to comfortably sleep on your side, back, or stomach without feeling restricted. It uses Thermolock technology, preventing heat loss through the opening since it has an extra layer of insulation along the zipper. It features a polyester lining, which is a synthetic fabric that is very strong and colorfast. This sleeping bag can withstand 40°F temperatures, keeping you warm on chilly summer nights.

Equipped with an interior pocket, this sleeping bag has a convenient place to store essentials. With a lightweight build, it is an excellent choice if weight is your first priority. It has a zipper guard, keeping the material from snagging in the zipper. This sleeping bag has roll control, is made to be easy to pack, and features a quick cord, which is a no-tie closure making it simple to fold.

    Pros
    • Roll control tab keeps the sleeping bag in place
    • Zipper guard prevents the fabric from tearing
    • Features lightweight construction
    Cons
    • Polyester absorbs sweat
    • Rectangular shape is not very insulated
How to Decide on Your New 40 Degree Polyester Sleeping Bag: Additional Factors to Keep In Mind:
The Best Shape for Your 40 Degree Polyester Sleeping Bag
Rectangular Sleeping Bags

Trying to pick the perfect rectangle sleeping bag for you? We will help you decide by giving you some information that you need. With a spacious design, rectangular sleeping bags are optimal for those who like plenty of room to stretch out. They accommodate varying sleeping positions, giving you plenty of room to get comfortable, regardless of your sleeping position. Rectangular sleeping bags have double zippers, which allow you to turn the bag into a flat blanket, for hotter nights. One downside is that they are not very heat-efficient, allowing the cool air to circulate due to their spacious design. Moreover, they are quite heavy, so they aren't good for when weight is a concern. Decided on which shape is perfect for you? Then why not start by looking at this fantastic option.

Mummy Sleeping Bags

Looking to purchase a new sleeping bag to improve warmth? We have four mummy sleeping bags available. Click here to check one out right now. Mummy sleeping bags weigh less than rectangular bags, so you won't have to sacrifice warmth over weight. A potential downside is that they provide less space to move around, making them uncomfortable for sleepers who toss and turn. On the other hand, they help trap body heat, providing maximum warmth, since their tight fitting cut is designed to trap body heat.