3-Season Synthetic Sleeping Bags

Featured review by Scoutmaster Jon

Warm, comfortable bag that performs as rated, with convenient features usually associated with more expensive gear.

I paid $89 for the Kelty Tuck. At that price, I really wasn't expecting much. I do most of my camping in North Carolina, though, so even though I was spending two weeks in the Sangre de Cristo mountains of New Mexico, I really couldn't justify spending $200 for a 20-degree bag. So I bought cheap and prepared to suffer. So, first thing, the EN temperature rating is pretty accurate. On one night, the temperature was in the 30s, and it was raining so everything was damp, and I was maybe a little cool.

Read more: Kelty Tuck 20 reviews (4)

Reviewed by Wade In The Water

A sleeping bag with a couple of tricks up its sleeve, or in the bag as the case may be. With a zipper-less design and made from recycled materials, it's based on Sierra Designs' best selling Cloud Sleeping Bag, but at a much friendlier price.

  Sierra Designs Night Cap 20º Sleeping Bag—pillow, pad, tent, and view not included. About Sierra Designs has been around since 1965 when founders Bob Swanson and George Marks decided all people deserve good gear for exploring the outdoors. Their aim was to produce products that were inspired by adventure, trail tested, and trouble free. They continue that tradition today. You can learn more about their story and their products at https://sierradesigns.com/our-story. I received this Sierra Designs Night Cap 20º sleeping bag for the purpose of this review.

Read more: Sierra Designs Night Cap 20 review (1)

Featured review by Tooon

Great and affordable 0 degree bag. Comes with a built in hood to keep your noggin warm.

I am a hammock camper. I use a Clark NX-250. My mindset for gear when I pack is more packability and versatility than being one of these ultra light campers. I like to camp in early spring, fall, winter. I had been researching numerous cold weather bags when I stumbled upon this bad boy. From reading the reviews most stated what I was looking for... PACKABILITY! Most cold weather bags are so big when stuff sacked that you cannot fit them into most packs. I did not want my bag being strapped to the back of my pack in wintery conditions so looked long and hard for one that might meet my criteria that was WARM , PACKABLE, and if able to be fairly light.

Read more: Mountain Hardwear Lamina 0 reviews (9)

Featured review by Go Time! (Jesse Maloney)

Is my go-to bag for a couple of seasons now for some good reasons... but the ZIPPER!

I have a love/hate relationship with this bag. It has been my favorite synthetic bag I've owned. It presses down to 8 x 10. It's super silky comfortable. It has a great shape. The collar holds heat well. the compression sack is a really nice 3 strap/1clip design so you can unclip one strap and pull the lid back. The bag has a small pocket.  The zipper sticks HORRIBLY! Every 3-5 inches it sticks if you are trying to zip up from the inside of the bag. When it does stick, it's not an easy "backtrack and come undone" kind of stick; it sticks BAD.

Read more: Mountain Hardwear Lamina 20 reviews (8)

Featured review by KiwiKlimber

At entry-level price and above entry-level quality, this is an excellent 3-season bag that can withstand mild winter temps. It's just not very lightweight at 4 lbs.

Conditions: I bought this bag nearly five years ago because of an increased interest I was taking in colder weather trips and my Marmot Alpine 40 Minimalist wasn’t cutting it for lower temps. However, I liked my previous Marmot bag, so I stayed with the brand (and price range) instead of going all-in on a down bag. Someday I hope to upgrade to a down bag, but that just hasn’t happened yet. This bag has been mostly used during autumn and spring trips and only two winter trips with the lowest recorded morning temp being 18°F.

Read more: Marmot Trestles 15 reviews (24)

Reviewed by Bob Withrow

Big & Comfy

  Compare to 5 gal bucket Wide     I purchased another inexpensive winter bag and after a few nights realized that the only thing the liner wouldn't stick to is bare skin. And, well, let's face it, why use a bag you have to crawl out of without clothes when the temp is down into single digits? Not me anyway. I've seen this brand at REI for several years and took a closer look. For the price, it was an excellent value. It has baffles around the neck, a decent zipper with a baffle, and dual adjustments on the hood.

Read more: ALPS Mountaineering Blaze 0 review (1)

Featured review by John Galt

A roomy, versatile, lightweight sleeping bag with unique features that can also be used as a hammock top quilt.

I bought the Snugpak Jungle Bag to include in a lightweight hammock camping system and to also serve as a summer weight sleeping bag for use in a bivy sack or for just under the stars all by itself. Originally I had considered the classic U.S. GI issue polyester filled poncho liner or patrol bag for this purpose but new and genuine army issue gear has dramatically escalated in price over the years. That's when I discovered that the multiple features of the Snugpak Jungle Bag made the slightly higher cost of the Jungle Bag a much better value in my opinion.

Read more: Snugpak Jungle reviews (2)

Featured review by Backpackdoc

Best for those willing to haul extra weight. Two will zip together to make a double bag for more warmth (even a wide and a long will zip together).

Warmth is great. Fit is great. E&E can be challenging unless you figure out the zippers—small curve. Moisture—never noticed any. Packability is great—I get two of these in my Osprey Aether plus 100L pack with my tent and c air mattress. Loft—puffs up quite well after being unpacked. Ease of use—zippers are the only challenge that come to mind:  I've never seen a sleeping/mummy bag that didn't have zipper issues. Very well made and is lasting 7-10 years so far.

Read more: Marmot Trestles 0 reviews (5)

Reviewed by Arturo Ganly

With a good price and low weight, it is an excellent option for backpacking and traveling in three seasons.

This is the sleeping bag I use for my three-season outings, where temperatures can reach 0° C (32° F). 1) Warmth: The most extreme temperature in which I have used it was -6° C (21.2° F) and being with a warm layer I had no problems. But I would recommend it for situations over to 0° C (32° F). 2) Fit & Comfort:  It is a comfortable sleeping bag, not too tight at the height of the legs, which allows turning inside without problems. The only bad thing is that the hood could be a little more closed, to better protect the face and head from the cold.

Read more: Marmot Trestles Elite 20 review (1)

Featured review by Tÿcho

I love this bag.

Back story: As a scout in the '70s, late '70s, we camped year round and down versus synthetic was always a hot topic. At some point my parents got me a synthetic mummy bag that wasn't as warm in February as some of the huge down bags. In 1979 I went to Philmont and in ten days it rained six, wettest year on record. Wet night after wet night I was ever so glad to have a bag that was warm when wet. When my kids were young they each got Disney sleeping bags that were fun to snuggle in or use on sleepovers.

Read more: Kelty Cosmic Synthetic 20 reviews (3)