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Big Agnes
Star Fire UL Sleeping Bag: -20F Down

Out of Stock

Don't worry though, we have a lot more -40 to 4 Degree Down Sleeping Bags in stock than that.

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Star Fire UL Sleeping Bag

As an outdoor enthusiast of the ounce-counting variety, you're always looking for a way to lighten the load. Allow us to introduce to you the Star Fire UL Sleeping Bag. This toasty little number uses high-loft down and lightweight materials to keep both pack space and weight to a minimum. Designed for long-distance missions in cold weather, the down is treated to repel water, so those fine, air-trapped fibers won't lose their valuable loft in case of soggy mishaps.


  • A lightweight sleeping bag trekking or vertical missions
  • High-tear strength shell and inner footbox endure the rugged life
  • Hydrophobic 850-fill down delivers packable, reliable warmth
  • Body-mapped baffle and mummy shape optimizes thermal efficiency
  • Vertically structured sidewalls trap heat close to the body
  • 3D anti-snag draft tube prevents heat loss along the zipper
  • Contoured hood baffles cradle the head for a comfy sleep
  • Half-length zipper keeps weight to a minimum
  • Item #BAGZ28C
Pertex Quantum nylon ripstop
850-fill DownTek
Max User Height
[small] 5ft 5in, [regular] 6ft, [long] 6ft 6in
Shoulder Circumference
[small] 54in, [regular] 54in, [long] 34in
Hip Circumference
[small] 60in, [regular] 54in, [long] 36in
Foot Circumference
[small] 62in, [regular] 56in, [long] 38in
Bag Length
[small] 5ft 5in, [regular] 6ft, [long] 6ft 6in
Draft Tube
Pad Retainer
Fill Weight
[small] 3lb, [regular] 3lb 2oz, [long] 3lb 4oz
Storage Sack
Stuff Sack
Stuff Size
[stuffed] 9 x 20in, [compressed] (short) 8 x 9in, (regular) 8.5 x 9.5in, (long) 8 x 10in
Claimed Weight
[short] 3lb 4oz, [regular] 3lb 7oz, [long] 3lb 11oz
Manufacturer Warranty