Thermarest Saros 20 Sleeping Bag

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Thermarest Saros 20 Sleeping Bag



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Stock #: 951Z- Closeout

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The three-season Saros sleeping bag is the perfect choice for backcountry trips that start with a shaky forecast. eraLoft™ synthetic insulation offers warmth and quick-dry weather resistance that's ideal for backpacking and mountaineering in wet weather from spring through fall. New fabrics provide a softer feel, while our SynergyLink™ Connectors and mattress integration ensure superior comfort with efficient warmth and the freedom to move as you like for the best night’s rest possible.


EraLoft Synthetic Insulation:

  • A highly efficient and compressible synthetic insulation comprised of microfiber polyester
  • Core of each individual fiber is hollow, greatly boosting its heat-trapping capabilities while also shedding weight
  • Short-staple fibers also maximize loft and compressibility
  • Inherently water-resistant fibers maintain warmth when wet, and dry faster than even treated down

Zoned Insulation:

  • More loft on top of you, where you need it most; beneath you, where your mattress already insulates you and the value of lofted insulation is already minimized by compression, there is less fill

Synergylink Connectors:

  • Two elastic bands located on the bottom of the sleeping bag create a snug fit around any mattress up to 25 inches (63.5 cm) wide, keeping your bag centered and eliminating problems with sliding off your mattress or getting your bag twisted around you

Additional Details:

  • Heat trapping draft collar and full-length zipper draft tube
  • Differential cut maximizes loft
  • Snag-free zipper
  • Cinchable hood
  • External zip pocket
  • Silicone DWR-Treated 20D Nylon Shell
  • Stuffsack and storage sack included


Color Celestial Blue Celestial Blue
Weight 2 lbs 15 oz / 1.34 k 3 lbs 3 oz / 1.46 k
Fits 6 ft / 183 cm 6 fr lin / 198 cm
Girth, Shoulder 62 in / 158 cm 64 in / 163 cm
Girth, Hip 58 in / 147 cm 60 in / 152 cm
Girth, Foot box 40 in / 102 cm 40 in / 102 cm
Packed dimension 8 x 18 / 20 x 46 13 x 18 / 33 x 49
EN Comfort 1 C / 33 F 1 C / 33 F
EN Limit 23 F / -5 C 23 F / -5 C
EN Extreme -8 F / -22 C -8 F / -22 C
Fill eraLoft™ eraLoft™
Fill weight 879 g 1.02 k
Liner fabric 20d Polyester 20d Polyester
Shell fabric 20d Polyester Ripstop 20d Polyester Ripstop
Zipper side Left Left
Country of Origin Made in China Made in China



Additional Information

Additional Information

Collection Spring Cleaning Sale
Product Videos

Product Videos

  • Therm-a-Rest 3-Season Sleeping Bags