Sea To Summit Reactor Thermolite Liner - $57.95

This liner is made from lightweight Thermolite, a hollow-core fiber that provides extraordinary warmth for its weight and is breathable. The liner has a mummy shape with a box foot that fits in a sleeping bag to add up to 15F of warmth, or it can be used alone as a warm-weather bag. Drawcord hood with a mini cord lock. Packs into included 3 x 5 stuff sack. Size: 35 W x 82 L. Weight: 9 oz. - $57.95