Stay warm and cozy in frigid temperatures with this Sea to Summit Reactor Extreme Mummy Sleeping Bag Liner. It is made with Thermolite® Pro fabric that uses innovative infrared-absorbing ceramic pigments for a thermal boost, and HeiQ Fresh odor control technology helps keep the Reactor Extreme liner fresh, even after extended use. Sea to Summit Reactor Extreme Mummy Sleeping Bag Liner Orange - Famly/Tech Sleepn Bags at Academy Sports