Lost Ranger UL 3N1 0



The Lost Ranger UL 3N1 0° sleeping bag is part of the latest evolution of the Big Agnes Sleep System. This modular ultralight bag design offers just what you’d expect: three bag configurations in one simple, yet technical sleep system that stays attached to your pad, so you won’t roll off in the middle of the night. It's the only bag you need for 3-season camping, backpacking and everywhere in between. These ultra-lightweight, down-fill bags deliver comfort and versatility no matter your sleep style or temperature preference.


Please note, the underside of these sleeping bags are un-insulated to save weight and packed space. They require a pad underneath for insulation. Pad not included.


Big Agnes
Gray / Orange
- Regular: fits users up to 6 ft
- Long: fits users up to 6 ft 6 in
Temperature Rating F:
0° F
Temperature Rating C:
-18° C
Insulation Type:
850 fill DownTek™ repels water while maintaining insulating value - bluesign® Certified PFC-free water-repellent chemistry
Shell Material:
Ultralight nylon ripstop
Lining Material:
Ultralight nylon ripstop
Pad Size Needed:
- 20-30 in x 72-78 in
- Rectangular-shaped pad recommended
- Pad not included
- Inner Bag Regular: 1 lb 12 oz / 794 g
- Outer Bag Regular: 1 lb 2 oz / 510 g
- Inner Bag Long: 1 lb 15 oz / 879 g
- Outer Bag Long: 1 lb 4 oz / 567 g
Fill Weight:
- Inner Bag Regular: 16 oz / 454 g
- Outer Bag Regular: 8 oz / 227 g
- Inner Bag Long: 18 oz / 510 g
- Outer Bag Long: 8 oz / 227 g
Stuff Sack Size:
- Regular: 9 x 20 in
- Long: 9 x 20 in
Compressed Size:
- Regular: 10 x 9 in
- Long: 10 x 9.5 in
Circumference at Shoulders:
- Inner Bag Regular: 62 in
- Outer Bag Regular: 69 in
- Inner Bag Long: 65 in
- Outer Bag Long: 72 in
Circumference at Hips:
- Inner Bag Regular: 54 in
- Outer Bag Regular: 61 in
- Inner Bag Long: 57 in
- Outer Bag Long: 64 in
Circumference at Foot:
- Inner Bag Regular: 43 in
- Outer Bag Regular: 55 in
- Inner Bag Long: 46 in
- Outer Bag Long: 58 in
Other Features:
  • 3N1 System Bags offer three bag configurations for temperature versatility with a technical, roomy sleeping space that keeps you on your pad throughout the night
  • Ultralight, durable materials with 850 fill Downtek™ water-repellent down, for those who aren't willing to sacrifice comfort for compressibility
  • Pad Cinch System is adjustable to a variety of pad sizes. The self-equalizing drawstring easily connects bag to pad and the middle securement feature provides extra stability
  • Maximum thermal efficiency is achieved when inner and outer bags are layered, using offset quilted construction to minimize cold spots
  • Sleep on any side using the inner bag alone and within the outer bag. Three-quarter, anti-snag, ambidextrous zipper stays out of the way when side sleeping
  • The inner bag design mimics Big Agnes' award-winning Sidewinder sleeping bag, designed for side sleepers and made to move with you from side to side
  • Insotect Flow™ vertical baffles contour to your body to provide a more comfortable fit and keep you warmer
  • Keep your head snug and warm using the inner bag with jacket-style hood
  • Spacious, rectangular-shaped outer bag is constructed with no-draft collar, no-draft wedge, and a single no-draft, anti-snag left side zipper with zipper garage
  • Ultimate comfort and additional hand warmth with hand tuck pockets at the top of outer bag
  • Access from top and bottom of both inner and outer bag with two-way zipper for easy temperature control throughout the night
  • Easy access to discreet pillow barn on pad sleeve keeps your pillow tucked in all night (pillow sold separately)
  • Storage sack & stuff sack included

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