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Big Agnes
Lost Ranger UL 3N1 Sleeping Bag: 0F Down

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Why We Like The Lost Ranger UL 3N1 Sleeping Bag

Four-season performance in one sleeping bag? It's unheard of, so Big Agnes created a clever solution: a three-in-one design. The Lost Ranger UL 3N1 Sleeping Bag is two ultralight sleeping bags that are still comfortably light together while we're backpacking in winter conditions. The rectangular outer bag is great for warm summer nights, and the inner Sidewinder mummy bag is ideal in the shoulder seasons. Together, they deliver zero-degree warmth so we can explore all year round.


  • Innovative three-in-one sleeping bag for year-round camping comfort
  • Bags layer to provide warmth down to 0 degrees on winter adventures
  • Separated bags offer comfort ideal for spring, summer, and fall
  • Treated DownTek insulation resists moisture for all-weather loft
  • Pad retainer fits many sleeping pad sizes and secures with a cinch
  • Corner hand pockets allow campers to wrap outer bag around shoulders
  • Jacket-style hood insulates around the head on cooler evenings
  • Sidewinder design of inner bag allows comfortable side and back sleeping
  • Item #BAGZ2C2
nylon, PFC-free water-repellent coating
850-fill DownTek (down, PFC-free water-repellent coating)
[outer bag] semi-rectangular, [inner bag] mummy
two-way, 3/4-length
Max User Height
[regular] 6ft, [long] 6ft 6in
Shoulder Circumference
[outer bag] (regular) 69in, (long) 72in, [inner bag] (regular) 62in, (long) 65in
Hip Circumference
[outer bag] (regular) 61in, (long) 64in, [inner bag] (regular) 54in, (long) 57in
Foot Circumference
[outer bag] (regular) 55in, (long) 58in, [inner bag] (regular) 43in, (long) 46in
Bag Length
[regular] 6ft, [long] 6ft 6in
Draft Tube
[outer bag] no, [inner bag] yes
[outer bag] 2 hand, [inner bag] none
Pad Retainer
[outer bag] Pad Cinch System, rectangular pad recommended (20 - 30 x 72 - 78in), [inner bag] no
two-way zippers
Fill Weight
[combined bags] (regular) 23oz, (long) 26oz, [outer bag] (regular) 8oz, (long) 8oz, [inner bag] (regular) 16oz, (long) 18oz
[combined bags] 0F, [outer bag] 45F, [inner bag] 20F
European Norm/ISO Comfort Rating
[combined bags] 17F
European Norm/ISO Lower Limit Rating
[combined bags] -35F
Storage Sack
Stuff Sack
compression sack included
Stuff Size
[stuff size] 9 x 20in, [compressed size] (regular) 10 x 9in, (long) 10 x 9.5in
Claimed Weight
[combined bags] (regular) 2lb 15oz, (long) 3lb 3oz, [outer bag] (regular) 1lb 2oz, (long) 1lb 4oz, [inner bag] (regular) 1lb 12oz, (long) 1lb 15oz
backpacking, ultralight backpacking, weekend camping, winter camping
Manufacturer Warranty

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