versatile, lightweight sleeping bag liner with premium PolartecA(R) Alpha(TM) Direct fleece Wherever your travels and overnights take you, wrap yourself in the soft, cozy warmth of our Alpha Direct Fleece Liner. Add this liner to your sleep system to add warmth and comfort, while protecting it from dirt, odor, and body oils. Lightweight, breathable, and surprisingly warm PolartecA(R) Alpha(TM) Direct fabric provides a cozy and premium sleep experience. Packing small, this liner is a great companion in your carry-on bag, car camping kit, or backpack. The extra-luxe layer dreams are made of, literally. This warm, micro-fleece liner will help you melt away any chill from a day of travel or traverse.PolartecA(R) Alpha(TM) Direct fabric is lightweight, highly breathable, compressible, and fast dryingDesigned to regulate your temperature in a variety of conditions and usesKeeps your sleeping bag clean and protected while adding 5 - 10Adeg of warmthStands alone as a packable layer for travel and warm-weather overnights under the starsKeep dirt and body oils out of your sleeping bag with this easy-to-wash removable linerEasily reversible to fit right or left zip sleeping bagsMinimalist cinch-hood closure for one-handed temperature regulationDurable seam construction is smooth and comfortable against your skinStuff sack included