Therm-A-Rest Saros 20F Sleeping Bag, Small, Stargazer

SKU: TARBS20SS

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Review Summary

2025-06-20T20:00:00

Rated 5 out of 5

Haven't tried yet the sleeping

Haven't tried yet the sleeping bag but it does look very good and warm enough to do some bivouacs

Emilio A.

2025-06-02T20:00:00

Rated 5 out of 5

Simply the Best

I only use Therm a Rest sleep systems. Simply the best

Ross M.

2025-04-01T20:00:00

Rated 5 out of 5

Super bag for the price,

Super bag for the price, I recommend to anyone.

Clinton S.

2024-11-06T19:00:00

Rated 5 out of 5

Very warm

Very warm

Cole T.

2024-02-26T19:00:00

Rated 5 out of 5

Super bag for a sailboat!

It's a great bag that performs well in the moist marine environment. Just what I needed. And the non-snag zipper is a life saver in the tight quarter berth.

Kevin M.

2023-09-19T20:00:00

Rated 5 out of 5

Super warm and lots of

Super warm and lots of room

Quinn W.

2023-01-02T19:00:00

Rated 5 out of 5

Wonderful sleeps

I am a side sleeper and am able to do this in this bag which I am extremely happy about. The foot pocket is a very useful feature and the no catch zipper with baffle is impressive. I am very excited about my new sleeping bag.

Erin B.

2021-03-07T19:00:00

Rated 5 out of 5

Perfect for backpacking

I have used my thermarest for multiple outings this winter slept comfortably every time! Highly recommend.

Handy C.

2021-02-23T19:00:00

Rated 5 out of 5

Perfect Bag for Damp Weather

Great bag for cooler weather when the air is wet or it's raining. Dries quick and stays warm!

Josh T.

2021-01-10T19:00:00

Rated 4 out of 5

Roomy and warm in all the right places

I currently use this bag for winter camping in the desert. The comfort for me is the top sell. The price was also very workable for me. I think the trade off for the prices is the large pack size that comes with the synthetic fill. Despite the size I'm happy to have made this purchase as i know I can rely on it for the comfort and warmth. Eventually I'll replace this bag for myself with something that does compress more and pass this off to my clients which I'll be able to do with full confidence.

Travis

2019-04-23T20:00:00

Rated 5 out of 5

Solid Synthetic Bag with Features

First-things-first, I'm allergic to down, so Thermarest's down bags simply aren't an option for me. They look rad, but I can't use them. I grabbed the Saros for my 20-degree do-it-all bag, and so far I've been really satisfied. It's been through a year of use, and so far the fill hasn't packed down, the zippers are still functioning great, and I can pair it with my Proton blanket for those very cold nights. Also, didn't realize it came with the foot pocket, but that thing is rad! If I had to pick one thing I don't care for, it'd be the connectors that wrap around my sleeping pad. They just don't quite fit my pad. I'm 6' tall, and the Regular size just fits me.

Addison

2017-12-16T19:00:00

Rated 4 out of 5

Great sleeping bag

This is by far the best sleeping bag I've ever slept in. So warm and comfortable. I would recommend buying a sleeping pad to use under the sleeping bag. It's nice that the pad is kept in place with straps so you don't roll off when turning in your sleeping bag.

Thomas

2017-11-01T20:00:00

Rated 4 out of 5

great wet weather bag

this is a fairly light, warm wet weather bag, there is lots of ground fog and rain coming off the lakes where I roam. theres not much to complain about with the bag, but I have 2 comments that are probably specific to me. the bag is a little tight across the shoulders. i'm only 5'10"" so the standard bag is perfect in length but I have to roll on my side to get the zipper up and even that is a chore because I'm larger across the shoulders, the other problems is the mattress straps. i bought the camper SV XL for the extra width at the shoulders. there is no way your stretching the straps around that. longer straps would be helpful.

Hatchetman

2016-09-18T20:00:00

Rated 5 out of 5

Very packable for synthetic

Use this mostly for camping in a damp climate. Packs down very good for a synthetic. Very comfortable and handles cold temperatures great. Draft collar and straps on back side of sleeping bag are awesome features. One thing is you will want to use this sleeping bag with a pad as there is no insulation on the bottom of the bag.

Joshuan89

2016-02-01T19:00:00

Rated 5 out of 5

Finally a compact, warm synthetic!!

I adore this bag! I am a girl guide leader so I go camping quite a lot in the beginning and end of season. For years I was looking for a bag that was synthetic (due to my allergy to down), and compact. They have engineered this bag to perfection! Easy to get in and out of, packs small (compared to similar styles) and comes with connectors so i don't roll off my pad! Also this bag does a great job o keeping my body at a comfortable temperature as Im actually a warm person and tended to get hot easily at night.

Guider L.

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Therm-A-Rest Saros 20F Sleeping Bag, Small, Stargazer Specifications

  • Color

    Stargazer

  • Fits

    66" (168cm)

  • Girth, Shoulder

    58" (147cm)

  • Girth, Hip

    58" (147cm)

  • Girth, Foot box

    44" (112cm)

  • Recommended Temperature Comfort

    32 F (0 C)

  • Recommended Temperature Limit

    20 F (-6 C)

  • Fill material

    eraLoft Polyester Hollow Fiber

  • Shell fabric

    20D Polyester with DWR

  • Lining fabric

    20D Polyester Taffeta

  • Country of Origin

    China

  • Dimensions (W x L x H)

    29 x 73 x 4.5" (73.6 x 185.4 x 11.4cm)

  • Weight

    2.8125 lbs (1.27kg)
    Fill: 2.0625 lbs (0.95kg)

  • UPC Code

    040818131640

About Therm-A-Rest Saros 20F Sleeping Bag, Small, Stargazer

FEATURED REVIEWS

Haven't tried yet the sleeping

By Emilio A.

Haven't tried yet the sleeping bag but it does look very good and warm enough to do some bivouacs

Simply the Best

By Ross M.

I only use Therm a Rest sleep systems. Simply the best

Three-season synthetic bag is ready for any conditions Mother Nature sends your way.

The three-season Saros sleeping bag is the perfect choice for backcountry trips that start with a shaky forecast. The Saros uses eraLoft synthetic insulation, which is quick-drying and weather resistant, making it ideal for backpacking and mountaineering in wet weather from spring to fall. The fit of the bag has been perfected in onsite cold chamber to create W.A.R.M. fit that allows room for multiple sleep positions without compromising thermal efficiency.

SynergyLink Connectors also integrate the Saros with your pad to ensure superior comfort with efficient warmth and the freedom to move as you like for the best night's rest possible. The Saros is offered in three sizes and designed to fit both men and women. Compression sack and storage sack included.

Therm-A-Rest Saros 20F Sleeping Bag, Small, Stargazer Features

  • eraLoft Insulation: Efficient and compressible, water-resistant synthetic fill uses hollow fibers to reduce weight without sacrificing warmth
  • W.A.R.M. Fit: With Additional Room for Multiple positions (W.A.R.M.) fit means this bag allows for various natural sleep positions while maintaining thermal efficiency
  • SynergyLink Connectors: Integrate the bag with a pad for optimal comfort and thermal efficiency; removable for versatility
  • Zoned Insulation: Maximizes warmth and saves weight by intentionally placing fill where you need it most
  • Toe-asis Foot Warmer Pocket: Ergonomic toe box that rapidly warms cold feet in a pocket of warm insulation
  • Quilt and Blanket Loops: Customize your sleep system by layering quilts or tech blankets for increased warmth
  • Additional features: Heat-trapping draft collar, full-length zipper draft tube, snag-free zipper, cinchable hood and external zip pocket
  • Compression sack and storage sack included

Warranty Information

This product has a limited lifetime warranty.

Key Features

  • Compression sack and storage sack included

What's in the box:

  • Saros 20F Sleeping Bag (Stargazer)
  • Compression Sack
  • Storage Sack
  • Therm-A-Rest Lifetime Limited Warranty