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Thermarest Saros 20F/-6C Sleeping Bag

  • Product Number: 5664

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.


  • eraLoft Insulation: Efficient and compressible, our water-resistant synthetic fill uses hollow fibres 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 our 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


  • Sizes: Regular, Long
  • Fill material: eraLoft Polyester Hollow Fibre
  • Shell fabric: 20D Polyester w/ DWR
  • Lining fabric: 20D Polyester Taffeta
  • Colour: Stargazer


  • Weight: 3 lbs 3 oz
  • Length: 80 in
  • Height: 4.5 in
  • Fits: 72 in
  • Packed dimension: 9.5 x 10.5


  • Weight: 3 lbs 9 oz
  • Width: 33 in
  • Length: 85 in
  • Height: 4.5 in
  • Fits: 78 in
  • Packed dimension: 9.5 x 10.5