Sea to Summit Reactor Thermolite Liner L2220W cradles your arches and allows

cradles your arches and allows you to move naturally

-Stretch-fit topline binding snugs leg to keep warmth in and cold out

Weather: Wet – waterproof

They have tough steel shanks for extra stability

4m multi-directional lugs for traction

Sea to Summit Reactor Thermolite Liner L2220W cradles your arches and allowsThe THERMOLITE Reactor liner is our top seller in the sleeping bag liner range. It's an excellent cold weather option for those who need additional warmth. The hollow core fibers trap heat and offer extraordinary insulating properties. This is a super stretchy, soft, and comfortable choice with a mummy shape, foot box and a drawcord hood. Compact and lighter weight than fleece, this is a best seller for good reason. Adds up to 14F 8C of warmth to a