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Therm-a-Rest Saros Sleeping Bag: 20F Synthetic


Enjoy three seasons of blissful sleep.

Hit the Pacific Crest Trail with the Therm-a-Rest Saros Sleeping Bag in your backpack and enjoy blissful sleep from late spring through early fall. Synthetic insulation repels moderate cold and an external water-resistant coating helps the shell repel light moisture. This is a rugged and reliable workhorse of a sleeping bag that's just as comfortable as it is versatile.

  • EraLoft synthetic insulation is warm, easily compressible, and hydrophobic
  • Zoned insulation uses fill sparingly on the edges and underside, and instead concentrates fill at the top of the bag where it provides the most efficient warmth
  • Mummy shape tapers in width from head to toe, leaving room to move at the shoulders and keeping insulation close at the footbox for added warmth
  • DWR coating makes the shell material water-resistant and allows it to repel light moisture
  • Draft collar creates a baffle around your neck so cold air can't sneak in at the hood and down inside the body of the sleeping bag
  • Snag-free zipper design means you won't be left fumbling around when you need to climb out of your bag at night
  • Synergy Link straps connect your air mattress to the bottom of your sleeping bag so you can't roll off your mattress at night
  • Stash pocket near the head gives you easy, quick-access storage for a headlamp
  • Stuff sack and storage sack are included for transportation and storage
  • Item #CAS0788

30D polyester
Draft Collar
Max User Height
[regular] 6 ft, [large] 6 ft 6 in
Shoulder Circumference
[regular] 62 in, [large] 64 in
Hip Circumference
[regular] 58 in, [large] 60 in
Foot Circumference
[regular] 40 in, [large] 40 in
20 F
European Norm Comfort Rating
33 F
European Norm Lower Limit Rating
23 F
Stuff Size
8 x 18 in
Stuff Sack
Storage Sack
Claimed Weight
3 lb 3 oz
Recommended Use
backpacking, camping
Manufacturer Warranty

Tech Specs

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Therm-a-Rest Guarantee


NEW! Therm-a-Rest? 3-Season Sleeping Bag

Our 3-season sleeping bags are designed to keep you warm down to 20F (-7C) and are light enough to pack on any trail. The award-winning, down-filled Antares sleeping bag and the synthetic Saros sleeping bag are excellent choices whether you're a backpacker, mountaineer or kayaker. Watch our video to learn how Therm-a-Rest sleeping bags let you to sleep better and go farther...