Sea To Summit Reactor Sleeping Bag Liner, Extreme Standard (85 X 31.5).

Insulated sleeping bag liners bring warmth and personal hygiene to any sleeping bag. Thermolite Pro technology uses knitted hollow core fibers and absorbing infrared ceramic pigments to reflect body heat back to the wearer for increased warmth and comfort. The drawcord footbox can be opened and closed for optimal comfort and integrates perfectly with the Sea to Summit sleeping bag's Free-Flow Zip system footbox. HeiQ Fresh's anti-odor technology keeps the liner fresh even after long periods of use. This mummy-shaped liner is made of knitted fabric with amazing stretch for freedom of movement. Seamlessly adapts to any type of sleeping bag. Sea to Summit