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3-Season Down Sleeping Bags

Top Picks

How we choose: The best 3-season down sleeping bags highlighted here were selected based on 774 reviews of 301 products. Our top picks are those that are readily-available in the United States and have received the highest overall ratings from reviewers.

How we test: Trailspace is powered entirely by our community of readers. The reviews posted here reflect the real-world experiences of outdoor enthusiasts just like you.

If you've used a 3-season down sleeping bag that you think should be listed here, please share your experience.

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Western Mountaineering MegaLite

user rating: 5 of 5 (12 reviews)

This bag is high quality, very versatile, compresses to 6x6 inches with a compression sack. Very comfortable to sleep in, not like most other mummy bags. Can be used well below 30 degrees, or up to the 70's. Well-made and a long-term investment.

Reasons to Buy

  • Light, warm, and versatile
  • Roomy and very comfortable
  • Packs ultra-small, and retains its loft for many years
  • The Pertex fabric is somewhat water-resistant and quite durable
  • The bag has continuous baffles allowing the down to be shifted as needed
  • The hood fits well, and the draft tube works very well
  • Full-length zipper
  • Very high quality

Reasons to Avoid

  • Need to be a little careful so the zipper doesn't snag the fabric
  • Not Waterproof

I've had this bag for 17 years and have used it in a wide range of temps in tents, tarps, and shelters. I've been toasty down to 15 degrees F. and comfy up into the 70s. The bag's extra girth means you can wear fleece or whatever to extend the range for lower temps, or in the summer if it's warm you can unzip it and use it like a quilt. A really nice bag that is still like new (except for where I snagged the Pertex with the zipper and had to make a 1" field repair which has held for a few years so far).

Read more: Western Mountaineering MegaLite reviews (12)

Sea to Summit Ascent 25

user rating: 5 of 5 (1 review)

As a long-time camper and backpacker, I have used quite a few sleeping bags over the years, some of which I found less than ideal in comfort and performance. I am now primarily a canoe camper, who also sometimes camps in campgrounds in a pop-up trailer, and I think I have finally found the ideal sleeping bag! This Ascent 25 Sea to Summit bag is the most comfortable bag I have ever used; an Ultra-Dry Down bag, it packs compactly, is lightweight, has various ventilation options, and I have found it suitable for a wide range of temperatures from 25 degrees (f)(-4C) to temperatures in the 60's and 70's (15's and 20's C). I can highly recommend the Ascent as a three-season bag for campers, backpackers, or canoe campers, based on my experiences using it for five camping trips so far. It will continue to get more use as the summer progresses.

Reasons to Buy

  • Comfortable in varying temperatures
  • Packs compactly
  • Water-repellent down reduces negative impact of moisture
  • Rectangular shape with large foot-box makes it a roomy bag

Reasons to Avoid

  • You have to like bright green! I do, as it matches my tent and camper.
  • I think the only true "Con" is that, as with any sleeping bag, you must be careful with zippers to not catch the fine, thin fabric. With three zippers, the likelihood of catching fabric is greater.

I have quite a collection of Sea to Summit gear in my canoeing kit, mostly dry bags and camp kitchen gear, but this is their first sleeping bag I have tried. It is also the first down sleeping bag that I have owned.  So far, I am very impressed with the quality and design of the Ascent 25 bag. Though Sea to Summit identifies its primary use as a 2.5-season backpacking bag, I have used it for remote canoe camping and front-country camping on five trips since early May of this year. I rely on a good sleeping bag to keep me comfortable in my tent when canoe camping and in my pop-up tent trailer (Sylvan Sport GO) between May and November.

Read more: Sea to Summit Ascent 25 review (1)

Big Agnes Torchlight UL 20

user rating: 5 of 5 (1 review)

The Torchlight UL 20 is a fantastically cozy and versatile backpacking mummy bag. Super spacious when you want, but snug when you want that, with customizable zipper options. The ultralight 850 fill power Down-Tek makes it a great choice for ounce-counting backpackers.

Reasons to Buy

  • Lofty
  • Soft and cozy
  • Warm
  • Versatile
  • Roomy generous hood
  • Easily adjustable to your size
  • Water-resistant DownTek fill
  • No down leakage through the shell
  • Lightweight
  • Quick drying shell fabric
  • Good value for the quality and features

Reasons to Avoid

  • Zippers on adjustable panels snag easily
  • Snag "resistant" zipper isn't "snag proof"
  • The internal pocket would be better on the top side of the bag than on the bottom

I have been using a Mont-Bell UL SS Down Hugger #4 sleeping bag for about ten years. It has served me well, being very lightweight (1.5 lbs), and warm enough most of the time (rated 34°). It also has stretchy elastic baffle stitching, which made it easy to fit my extra girth. It is starting to look its age though, and sometimes I push the temperature rating or get a little nervous when camping in a wet environment. I was on the lookout for something new when the opportunity to try the Big Agnes Torchlight UL 20° sleeping bag came up.

Read more: Big Agnes Torchlight UL 20 review (1)

Western Mountaineering VersaLite

user rating: 5 of 5 (8 reviews)

The Western Mountaineering Versalite is just an overall great sleeping bag. While a bit on the pricey side, the Versalite is a well thought out sleeping bag design that is roomy, provides great warmth for its weight, and utilizes quality materials and construction. The Western Mountaineering Versalite is a great choice for anyone who has reached the point where they are looking to invest in a sleeping bag that will provide great performance in a very lightweight design.

Reasons to Buy

  • Lightweight
  • Quality construction
  • A truly snag free zipper
  • Outstanding draft collar and draft tube along zipper
  • Made in the USA

Reasons to Avoid

  • The price is a bit on the high side

Overview I’ve owned a number of sleeping bags over the years since I first got into backpacking back in the 1970s and really had no complaints with any of the bags I have owned. After I retired a number of years ago and started to get back into backpacking again I had picked up a Summit 20 sleeping bag made by Outdoor Vitals. The Summit 20 was a low cost and reasonable lightweight bag that I’ve used for the last five or so years and it does its job and I have no complaints. As I creep up towards my mid 60s I’ve been tweaking my gear to save weight where I can as I’ve found the lighter my pack is the more I enjoy my trips.

Read more: Western Mountaineering VersaLite reviews (8)

Western Mountaineering Apache MF

user rating: 5 of 5 (4 reviews)

A fabulous bag for summer mountain backpacking. Great 3-season bag.

Reasons to Buy

  • Great summer mountain backpacking sleeping bag
  • Anti-snag zipper
  • Very lightweight for the warmth
  • Shoulder collar keeps warmth in

Reasons to Avoid

  • Confining mummy
  • Expensive, but worth it

Summary - You can't go wrong with this bag for summer mountain backpacking. Warm with low weight. Anti-snag feature on zipper makes that midnight bathroom run a bit easier. And the way I like to re-hydrate with lots of warm tea after dinner, I cannot say enough about the zipper design. Also the shoulder collar (see pic) which is separate from the hood, does a great job in keeping any cold draft out, and on warmer nights, it can be left open. Ventilation on feet with the 2-way zipper is great when you need it.

Read more: Western Mountaineering Apache MF reviews (4)

NEMO Nocturne 15

user rating: 4.5 of 5 (3 reviews)

Finally a sleeping bag that I don't feel restricted in. The unique shape provides room to move and stretch while keeping the weight down and staying warm.

Reasons to Buy

  • Space to move around
  • Blanket fold to snuggle with
  • Comfort rating seems accurate
  • DownTek treated down
  • Only 2 lbs 11 oz
  • Pillow sleeve
  • Included storage sack

Reasons to Avoid

  • Must use care with zipper, tendency to snag
  • Included stuff sack too large, not waterproof

I have used this sleeping bag for almost a year. I am 5'8" and purchased the "men's" version of the bag because the "women's" version felt too short. Temperatures ranging from 20's to upper 70's F during the night. Varying humidity including rainy, snowy, and very dry weather. Over this time I have not had any issue with wear or cold spots. I use the provided storage sack when not in use. The included stuff sack did not compress the bag small enough and was not waterproof so I substituted a Sea to Summit waterproof compression sack when backpacking.

Read more: NEMO Nocturne 15 reviews (3)

Marmot Angel Fire

user rating: 4.5 of 5 (4 reviews)

I've owned the Marmot Angel Fire bag since 2004/5(?) and it has been my primary bag. Excellent compression, durable exterior, no defects/issues for over 12 years with an average of 8+ trips a year. Pros: lightweight, small pack size. Cons: mummy style can be difficult to sleep comfortably in as a side sleeper, but this is user preference.

Reasons to Buy

  • This bag is light!
  • Very warm bag (for almost all the years I've used it)
  • Color: light blue and black (but this should matter least of all features!)

Reasons to Avoid

  • Wish there was a pillow slot/stash near the head.
  • Mummy style can feel cramped for a sidesleeper (not a downside of the bag—just the style).
  • After about 12 years of heavy usage (8+ trips/year) this bag no longer keeps me warm without supplementation.

The only reason I didn't repurchase this bag is that my personal dimensions have changed over the last couple of years and the mummy bag style just isn't as fitting to my physique as a more generous bag. However with that being said, this is an incredible bag and under the same conditions I would buy it again. I purchased it new in 2004 or 2005. I never had trouble with the down leaking, excess moisture retention in humid conditions, or warmth. For me this bag was almost too warm at times and I would sleep with it unzipped.

Read more: Marmot Angel Fire reviews (4)

Western Mountaineering AlpinLite

user rating: 4.5 of 5 (4 reviews)

Great lightweight three-season bag.

Reasons to Buy

  • High quality down
  • Lightweight
  • No-snag zipper
  • Roomy for a big guy
  • Quality construction

Reasons to Avoid

  • No pocket near head
  • Not cheap

I bought this bag after taking a nice 30-degree bag on the John Muir Trail in mid-September. We hit some cold weather with nights dipping into the teens. To stay warm, I had to put on every piece of clothing I had and wear it in the sleeping bag. For about 4 oz of additional weight, the Western Mountaineering AlpinLite solved my problem. It is light, super high quality, and fits me great. I got the long version because I am 6'2". One problem I always have with mummy bags is the width at the shoulders.

Read more: Western Mountaineering AlpinLite reviews (4)

Patagonia Fitz Roy 30°

user rating: 4.5 of 5 (1 review)

The Fitz Roy is a well-made, roomy, three-season down sleeping bag. Vertical baffles and a center zipper set this apart from many comparable bags. I particularly appreciated the quiet fabric, well-shaped hood and foot box, and dual baffles flanking that center zipper. True ultralighters may find this too bulky and heavy (short weighs 28 oz., regular 29 oz., long 30 oz.), but this is three-season bag should serve backpackers and car campers well.

Reasons to Buy

  • good quality down
  • reasonably lightweight
  • solid features
  • roomy, if that’s appealing

Reasons to Avoid

  • there are options that stuff smaller and weigh less
  • cost

INTRODUCTION Patagonia is a relatively new participant in the sleeping bag market but seems to have come up with a strong option. The Fitz Roy 30-degree sleeping bag I tested is a size long (up to a six-foot, six-inch person), is filled with 800 fill power down, and weighs 30 ounces/1.875 pounds. It also comes in short for people up to five foot, six inches (weighs 28 oz.) and regular for people up to six feet (weighs 29 oz.). Additionally, there is a 20-degree Fitz Roy. Putting this in perspective, sleeping bags that use the highest quality down, 850-900+ fill power, supply the same or better warmth in a bag that weighs 3-5 ounces less than the Fitz Roy 30.

Read more: Patagonia Fitz Roy 30° review (1)

Sea to Summit Trek TK II

user rating: 5 of 5 (2 reviews)

Good blend of performance, weight, and price.

Reasons to Buy

  • Lightweight
  • Warm
  • Semi-rectangular/semi-mummy shape
  • Very good value
  • Opens up fully for use as blanket, or for airing out.

Reasons to Avoid

  • Could be lighter
  • Zipper system can be confusing
  • Hood does not have an "in-between"—Either it lies flat, or you have to cinch it up fully

Spent WAY too much time searching for a sleeping bag that hit my top three "must haves" Lightweight Warm Not constricting Tried Big Agnes, North Face, a very attractive offering from Thermolite, REI's own brand, etc...  Finally decided on the Trek TKII after a test of the TK I version at my local REI.  It met my top three musts closely enough to earn a top rating. The Good: This is a semi-rectangular bag, not a mummy bag. That means is the shape is mummy like, but the footbox is much wider than a traditional mummy bag.

Read more: Sea to Summit Trek TK II reviews (2)

More Reviews of 3-Season Down Sleeping Bags

Trailspace reviewers have shared 774 reviews of 301 different 3-season down sleeping bags.

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Other Types of 3-Season Sleeping Bags

Find more 3-season sleeping bags reviewed in these related categories:

3-Season Synthetic Sleeping Bags

3-Season Hybrid Sleeping Bags

all 3-Season Sleeping Bags (0° to 32°F)

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