Great liner - Sea to Summit Reactor Plus Thermolite Liner - Compact

Bought to keep the inside of my sleeping bag cleaner, easier to clean the liner than the bag. Not sure about the added warmth, seems pretty light to actually add 15-20 degrees. But I'm sure it helps a little. Buy for the feel/convenience, not the added warmth.

This review was written in the old system and had content requirements that are different than reviews written today.