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Big Agnes Cinnabar Sleeping Bag: -40F Down

$949.95 - $1,049.95

Cinnabar Sleeping Bag

The Cinnabar range of sleeping bags is the warmest range from Big Agnes, and this Cinnabar Sleeping Bag is the warmer of the two. Its sub-zero rated down insulation is intended for expeditions like 8000m summits, self-supported missions across Antarctica, and all-around winter camping and backpacking. Despite being the warmest, the down insulation is surprisingly light, lofty, and packable. Big Agnes treated the down to retain its lofty warmth if it ever got wet, which would be difficult to do considering water-resistant, windproof Pertex Quantum protects it from winter's weather. The footbox features a burlier Pertex Quantum Pro waterproofing that comes in handy when moisture inside the tent drips down the walls and onto your feet.
  • The warmest Big Agnes sleeping bag for 8000m expeditions
  • 850-fill down insulation has a -40F temperature rating
  • DownTek hydrophobic coating keeps the down lofty in wetness
  • Pertex Quantum shell is windproof and water-resistant
  • Pertex Quantum Pro footbox adds waterproofing where it counts
  • Draft collar runs down full-length zipper and around hood
  • Internal mesh pocket stashes phones, headlamps, and other essentials
  • Stuff and storage sacks included
  • Item #BAGZ28E

[shell] Pertex Quantum (100% nylon ripstop) [lining] 100% polyester taffeta
850-fill down, DownTek
[footbox] Pertex Quantum Pro
mummy (room for layering]
full-length, YKK #5
Max User Height
[small] 5ft 5in [regular] 6ft [long] 6ft 6in
Shoulder Circumference
[small] 58in [regular] 64in [long] 66in
Hip Circumference
[small] 58in [regular] 58in [long] 60in
Foot Circumference
[small] 38in [regular] 40in [long] 42in
Bag Length
[small] 5ft 5in [regular] 6ft [long] 6ft 6in
Draft Tube
zipper, hood
1 internal
Fill Weight
[small] 45oz [regular] 50oz [long] 54oz
Storage Sack
Stuff Sack
Stuff Size
10 x 21in
Claimed Weight
[small] 3lb 12oz, [regular] 4lb 9oz, [long] 4lb 14oz
Recommended Use
backpacking, mountaineering, winter camping
Manufacturer Warranty

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Cinnabar - Expedition Sleeping Bag

Our burliest expedition bag to date, the Cinnabar will quickly become your best buddy whether summitting 8000m peaks in the Himalayas or trekking across Antartica on a self-supported mission. Built with a superlight, high-tear strength shell, insulated with 850 fill power DownTek™ water-repellent down, and designed with body mapped, thermally efficient baffles, this bag has your back (and all other body parts) when conditions make that a necessity.