Vapor Barrier Liner extends the temperature comfort range of your bag by 10Adeg to 15Adeg. By keeping your sleeping perspiration next to your body the effective warmth of your sleeping bag will be boosted 10-15 degrees. It is made of a waterproof, coated nylon to keep heat in and reduce evaporative heat loss. If you do longer deep winter trips a vapor barrier is a must.Vapor barrier keeps heat in.Waterproof, coated nylon keeps moisture out.Extends the temperature range of your sleeping bag.Size: 6'9" x 2'5" x 1'2"Weight 11 oz.Stuff Size: 12"x 8".Made in the USA.
