Big Agnes Lost Lake 30

$279.95 $167.95 -40%
  • Big Agnes Lost Lake 30

Big Agnes Lost Lake 30

$279.95 $167.95 -40%

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Don't worry as the rain pours outside your tent, you'll stay dry and warm in the Big Agnes Lost Lake SL down bag that features DownTek™ water-repellent down insulation.


  • DownTek 700-fill-power down repels water by employing nanotechnology and a proprietary process that applies a micro-thin polymer to the down
  • DownTek down repels water and maintains loft and insulation value, even when exposed to moisture
  • Proprietary application process creates a water-repellent, antimicrobial and antibacterial down insulation that actually floats on water
  • Insotect Flow™ Construction features internal Flow Gates™, which are vertical chambers with internal mesh gates that keep insulation from shifting up and down
  • Traditional style mummy bag is designed without the integrated pad sleeve normally found on Big Agnes System bags, and features full insulation underneath
  • Ripstop nylon shell has a water-repellent finish to shed water
  • Nylon taffeta lining is soft and breathable
  • Down-filled collar at top seals around the neck to prevent warm air from escaping and cold air from entering
  • Large draft tube located behind the zipper prevents warm air from escaping and cold air from entering
  • Interior fabric loops stabilize a sleeping bag liner, sold separately
  • 2-way, full-length YKK zipper zips to other bags of opposite configuration
  • Big Agnes Lost Lake SL mummy sleeping bag includes a mesh storage sack and a nylon stuff sack



Best Use Backpacking
EN Lower Limit 29
EN Comfort Unavailable
Temperature Rating (F) 29 degrees Fahrenheit
Temperature Rating (C) -2 degrees Celsius
Weight 2 lbs. 1 oz. / 2 lbs. 4 oz.
Shell Ripstop nylon
Insulation Type Down
Water-Resistant Down Yes
Fill 700-fill DownTek duck down
Fill Weight 14.5 / 16 ounces
Lining Nylon
Sleeping Bag Shape Mummy
Fits Up To (in.) 70 / 78 inches
Shoulder Girth (in.) 60 / 62 inches
Hip Girth (in.) 54 / 56 inches
Stuff Sack Size 7 x 9 / 8 x 8 inches
Stuff Sack Volume 5 / 7 liters
Gender Unisex
Weight - Metric 0.93 / 1.0 kilogram