Mountainsmith Poly Sleeping Bag Liner

Smart investment.

Expand the versatility of your sleeping bag with the Mountainsmith Poly Sleeping Bag Liner. This lightweight and compressible liner adds warmth without tacking on a ton of bulk or weight, or requiring you to buy a different bag, and it extends the life of your sleeping bag by protecting it from sweat and oils.

  • Add extra warmth to your bag with this liner
  • Polyester fabric is smooth and wicks moisture
  • Open access cover for easy entry and exit
  • Includes storage sack for convenience
  • Reviews
  • Q & A
Unanswered Question

Do you know how much "extra warmth" this liner provides? The description is a bit vague and I can't find a specific number listed anywhere online.