The Adaptor™ COOLMAX® sleeping bag liner is an excellent versatile choice that adapts to varied temperatures and humidity. It's ideal for use on its own in warm climates, or as a liner in your regular sleeping bag. The COOLMAX® fabric is super soft and luxuriously comfortable, kind of like your favorite tee shirt and with its moisture-wicking properties, it will help to provide a dreamy sleep wherever you are. A sleeping bag liner is imperative for keeping your sleeping bag clean and is easily washable. The COOLMAX® Adaptor™ liner is also available in an Insect Shield® to protect against insect in buggy environments.