The Sea to Summit Coolmax Adaptor Traveller Liner is a climate control sleeping bag liner specifically designed for warm and humid conditions. This liner adapts to varied temperatures and humidity because it's made of CoolMax, a proven moisture management fabric. Even if the weather is balmy, the Sea to Summit Adaptor wicks moisture away for a more comfortable night's sleep. A versatile sleep system, for use by itself or as part of a layered system. Adapts to varied temperatures and humidity. Wicks moisture for a more comfortable night's sleep. Comfortable stretchy fabric. Keeps sleeping bag clean. Sleep Sack. Machine washable and quick drying. Packaged in its own 4 in. x 6 in. Ultra Sil stuff sack. Made of CoolMax fabric. Size: 7'5x3' Wt. 11.6 oz.328g.