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Big Agnes
Lost Ranger UL 3N1 Sleeping Bag: 15F Down

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Why We Like The Lost Ranger UL 3N1 Sleeping Bag

Summer camping can lead to some Goldilocks-style discomfort: bag on, way too hot, bag unzipped, suddenly we're getting blasted with cold midnight breeze. Luckily, with the inspiration of the most versatile jackets out there, the Lost Ranger UL 3N1 Sleeping Bag is just right. Two sleeping bags—one in a lofty, lightweight rectangular shape and one mummy modeled after Big Agnes's Sidewinder bags—can be slept in together to offer cool-weather warmth when we need it and used apart for hot summer nights.


  • Three-in-one sleeping bag offers three-season camping comfort
  • Together, 15-degree rating provides warmth in the shoulder seasons
  • When used separately, each bag is ideal for summer weather
  • Water-resistant Downtek insulation stays lofty in all conditions
  • Pad retainer cinch with built-in pillow barn for secure comfort
  • Outer bag's corner pockets allow blanket-like wrap-around snuggling
  • Hood on inner bag offers additional warmth on breezy nights
  • Sidewinder inner bag shape offers comfort for side and back sleepers
  • Item #BAGZ2C1
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) 15oz, (long) 17oz, [outer bag] (regular) 7oz, (long) 8oz, [inner bag] (regular) 8oz, (long) 9oz
[combined bags] 15F, [outer bag] 50F, [inner bag] 35F
European Norm/ISO Comfort Rating
[combined bags] 28F
European Norm/ISO Lower Limit Rating
[combined bags] -17F
Storage Sack
Stuff Sack
compression sack included
Stuff Size
[stuff size] 8 x 17.5in, [compressed size] (regular) 8.5 x 8in, (long) 9 x 8.5in
Claimed Weight
[combined bags] (regular) 2lb 3oz, (long) 2lb 6oz, [outer bag] (regular) 1lb 2oz, (long) 1lb 4oz, [inner bag] (regular) 1lb, (long) 1lb 2oz
backpacking, ultralight backpacking, weekend camping
Manufacturer Warranty