Best Ultralight Sleeping Bag

When you go backpack camping, the light backpack could make your trip easier and more comfortable. Your sleeping bag is one of the things that can add much weight to your pack. But it is also one of the items that you can cut down some weight.

Ultralight sleeping bags not only offer a lot in terms of comfort, insulation, temperature ratings, weight-to-warmth, but also make your pack lighter. In this guide, we will show you some ultralight sleeping bags that offer warmth and comfort.

Quick Summary

  • If you want a sleeping bag made for warm temperatures, then you should consider the Hyke and Byke Ultra Lightweight Sleeping Bag. This sleeping bag is with waterproof fabrics and down insulation. It has a lower temperature limit of 30 degrees Fahrenheit, and 50 degrees’ higher limit.
  • If you are looking for the best budget sleeping bag that comes with extra features like electronics holder, foot box, and other impressive sets of accessories, then you should consider the Kelty Cosmic Sleeping Bag. This is a water-resistant ultralight sleeping bag that stays dry due to its nylon shell that puts a barrier between you and the elements.
  • If mobility is your primary concern, then we will recommend that you check the KLYMIT Down Sleeping bag. The zip design is ¾ and comes with two-way sliders that aid easy mobility. Also, the chest area is expanded to allow some form of movement.
  • If you are looking for a sleeping bag that you can strap to a mattress, then the Therm-a-Rest Questar Sleeping Bag might be what you need. It comes with a storage bag and a stuff sack. Plus, the loops at the back that allow you to strap it to a camping mattress.

Who Should Get This?

If the weight of your backpack has always been a problem, and you have been looking for the best ways to cut down on weight, then the ultralight sleeping bag is for you. Their weight does not compromise with comfort or warmth. Also, they come with a temperature rating, a feature that lets you know which bag to go for, and under which weather condition.

Best Ultralight Sleeping Bag: What to Consider?

Weight and Comfort

Every camper wants to feel warmth and comfort when they go camping. This is an important feature that you must be on the lookout for when you are buying your sleeping bags. For an ultralight sleeping bag, 2lb or less is a suitable weight.

Temperature Rating

Every sleeping bag has a temperature rating, and this gives you the right information about which one to go for under different weather conditions.
Sleeping bags with a lower limit means you can withstand the cold up to that point. It recommends that you go for bags with 25-30 degrees’ Fahrenheit ratings for cold nights and 10-15 degrees for warmer requirements.

Water Resistance

There is no guarantee here since they claim that sleeping bags are water-resistant may not be completely true during a rainfall.

Bags that have durable water repellent (DWR) coating comes with an extra layer that makes the sleeping bag hold water on the surface rather than soaking it. The DWR coating is usually on the shell fabric of the sleeping bag.

You can trust sleeping bags with this feature when you need to stay due to condensation in the tent.

Safety and Warmth

Safety is critical, and you should never compromise when you are choosing any product. You have to be informed about the bivy sacks or the shelter plus the sleep system of your sleeping bag. This will protect you in extreme conditions.


Your ultralight sleeping bag will be one of the most expensive items in your backpack, for it is made of high-quality materials. Our advice is that you don’t go for bags with a ridiculously low price. They can only serve you for a short period compared to good ones that are more durable.

Best Ultralight Sleeping Bag: Our Pick

1. Hyke and Byke Ultra Lightweight Sleeping Bag

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Hyke and Byke is a truly lightweight sleeping bag as it weighs below 3lb. It comes with nylon compression panels with straps that aid quick-release function. The sleeping bag is made of insulation and waterproof fabrics, so there is a guarantee that it might keep you dry.

What we like:

  • It has enough space to guarantee maximum comfort for most body types.
  • It is tested for safety and reliability.
  • All sizes and models weigh less than 3lb.

What we don’t like:

  • The quality of the zipper is not very impressive.

>> Check Price on Amazon <<

2. Kelty Cosmic Sleeping Bag

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This is the best budget sleeping bag among bags in the price category. Besides, it is also the warmest among bags in the same category. It weighs 2.8 lbs with a temperature rating of 20F and down fill power of 600. It is excellent for those with little space in their backpack because of its compression sack.

What we like:

  • It comes with a two-way anti-snag zipper that’s 1/3 in length. This makes it super easy to get in and out.
  • It comes in different lengths – short, long, regular, and women’s regular and long.
  • It offers the best warmth (20F) compared to other sleeping bags in the same price range.

What we don’t like:

  • Bulkiest of all the bags in the review. Chosen for performance and comfort.

>> Check Price on Amazon <<

3. KLYMIT Down Sleeping bag

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This is another water resistance sleeping bag with ¾ zip design that comes two-way sliders to aid easy mobility. The inner part is made from silky soft nylon to give you maximum comfort. Also, it comes with extra features for your convenience.

What we like:

  • The outer shell has a durable water repellent (DWR).
  • It has some great features, such as a broad chest area, a stash pocket, and a convenient foot box.
  • It features a ¾ zip design with two-way sliders for better mobility.

What we don’t like:

  • The down fill power is low, which makes it a little bit difficult to compress.

>> Check Price on Amazon <<

4. Therm-a-Rest Questar Lightweight Down Mummy Sleeping Bag

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This sleeping bag comes with a mesh storage bag, and also loops on the back that makes it possible to attach it to a camping mattress. It has a 20F temperature rating, and a down fills power of 650.

What we like:

  • It has an impressive weight-to-warmth ratio.
  • Asides the top zipper, it also has a bottom zipper in case you need more air circulation.
  • The loops at the back of the bag allow you to strap it to a camping mattress.

What we don’t like:

  • It might be a little bit tight for 6ft tall people.

>> Check Price on Amazon <<

Useful Tips and Resources

When you choose the sleeping bags for the first time, you might feel lost. There are majorly two categories of sleeping bags – mummy bags, and quilts.

Mummy bags cover you tightly with little space left. They can be quite cozy, but the tiny space means you might feel cramped. Generally, mummy bags are preferred in cold weather.

Quilts bags allow more space compared to mummy bags. So if you feel mummy bags will suffocate you, then this should be your choice. However, unlike mummy bags, quilts don’t come with a hoodie, so you will have to get an alternative. Quilt is preferred when the temperature is above freezing. You can learn more from here.

Final Words

Getting the best ultralight sleeping bag is all about getting one that offers the best warmth, comfort, and for sure lightweight. It will last your multiple camping seasons. I hope our guide helps, and now you know how to choose the right sleeping bag for your next camping trip.

What else do you know about the ultralight sleeping bag? We would like to hear from you in the comment section below!

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