Big Agnes: Bellyache Mountain SL 17

An image of Bellyache Mountain SL 17
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Our Price: $299.95 to $319.95

[$299.95] - RG/LZ     IMS#: 671679
[$319.95] - LG/LZ     IMS#: 671680
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Caption: Side View

Side View

Caption: EN Test Rating

EN Test Rating


Traditional Mummy bags are built for performance. Big Agnes is proud to introduce the most technical old-school sleeping bags ever! This bag is insulated with DownTek™ water repellent down and constructed with Insotect Flow™ patented technology. DownTek™ transforms down into a water repellant, anti-microbial and anti-bacterial insulation material. Even in the wettest of conditions, DownTek™ repels water while maintaining loft, insulation value and breathability. The mummy shape and lightweight materials will get you wherever you want to go, fast and dry.


  • Traditional style mummy shaped bags designed without the integrated pad sleeve
  • 70"/178cm YKK #8 zipper
  • Interior fabric loops for sleeping bag liners
  • Mate together left and right zip bags
  • Mesh storage sack & nylon stuff sack
  • No-draft collar seals around neck to keep cold air from sneaking in
  • No-draft wedge insulates the connection between the bag and pad
  • No-draft zipper tube insulates along the length of the zipper
  • Flow™ Construction: Insotect Flow™ is a flow-optimized insulation system that delivers uniform heat distribution and natural body contouring through its revolutionary baffle design. Flow Construction eliminates lateral and vertical down shifting by using vertical chambers with Flow Gates to regulate fill positioning and density. Strategically placed Flow Gates minimize vertical down shifting while vertical chambers minimize lateral shifting. With continuous vertical Flow chambers in place of traditional side seams, Flow bags eliminate potential cold spots which can occur with side seams. Vertical baffles now flow with your body for more rapid and uniform body heat distribution.
  • LEFT OR RIGHT ZIPPER? When you are in the bag, on your back, the right zip will be on your right side, left zip on your left side


Fill Type:700 DownTek™
Fill Weight:Reg: 21 oz / 600g // Long: 23 oz / 660 g
Bag Weight:Reg: 2lb 7 oz / 1105g // Long: 2 lb 10 oz / 1190 g
Shoulder Girth:Reg: 60 in / 152 cm // Long: 62 in / 157 cm
Hip Girth:Reg: 54 in / 137 cm // Long: 56 in / 142 cm
Foot Girth:Reg: 36 in / 91 cm // Long: 38 in / 96.5 cm
Compressed Size:Reg: 8 x 8.5 in / 20 x 22 cm // Long: 8.5 x 8.5 in / 22 x 22 cm
Stuff Sack Size:Reg & Long: 8 x 17.5 in / 20 x 45 cm

Bellyache Mountain SL 17

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