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Antares HD Sleeping Bag: 27F Down

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It's surprising that Therm-a-Rest's Antares HD Sleeping Bag barely weighs over two pounds despite its innovative insulation, protective shell, and convenient features for ultralight backpackers and campers alike. Therm-a-Rest's Zoned Insulation pairs light-and-lofty 750+ down treated in Nikwax's hydrophobic coating with a sewn-through insulated bottom that maximizes thermal efficiency and minimizes weight.

Therm-a-Rest also equipped the Antares HD with a water-resistant shell to shed moisture, and the ThermaCapture lining that reflects your own body heat back to you for a boost of warmth. SynergyLink connectors slide your sleeping pad through so you never roll off again. The Antares HD also features a cinchable hood, draft-blocking tubes at the collar and full-length zipper, a zippered external pocket, and included stuff and storage sacks.


  • 27F European Norm Comfort temperature rating
  • Zoned Insulation with Nikwax Hydrophobic 750+ fill down
  • Sewn-through insulated bottom
  • DWR-treated shell
  • ThermaCapture reflective lining
  • SynergyLink connectors for sleeping pad
  • Cinchable hood
  • Heat-trapping draft collar and draft tube
  • Zippered external pocket
  • Stuff and storage sacks included
  • Item #CAS003D
20D nylon, DWR treatment
Nikwax hydrophobic down (750+ fill), [bottom] sewn-through insulation
Max User Height
[regular] 6 ft, [long] 6 ft 6 in
Shoulder Circumference
[regular] 62 in, [long] 64 in
Hip Circumference
[regular] 58 in, [long] 60 in
Foot Circumference
40 in
Bag Length
[regular] 6 ft, [long] 6 ft 6 in
Draft Tube
yes, collar and zipper
1 zippered external
Pad Retainer
yes, SynergyLink connectors
Fill Weight
[regular] 15.5 oz, [long] 1 lb 1.1 oz
27 F
European Norm Comfort Rating
27 F
European Norm Lower Limit Rating
15 F
Storage Sack
Stuff Sack
Stuff Size
7 x 12 in
Claimed Weight
[regular] 1 lb 15 oz, [long] 2 lb 2 oz
Recommended Use
ultralight backpacking, camping
Manufacturer Warranty