60% Cotton, 40% Polyester | Imported | Extra Warm: Add an extra layer of warm to your sleeping bag with the help of this machine-washable ultra-brushed soft-touch sleeping bag liner | Easy To Use: Comes equipped with a quarter-length slit, complete with a hook-and-loop closure, that allows for easy entry and exit | Klymit Bag Compatible: Pair with any Klymit camping sleeping bag; Works with both Mummy and rectangular backpacking sleeping bags | Compact and Easy To Store: Included compression stuff sack packs down small; Measures 35 by 78 inches unfolded, 8.5 by 6.5 inches when packed, and weighs 9.6 ounces | Get Outside With Klymit: We want you to focus on soaking up your time outside with the company you keep and spend less time worrying about your lightweight camping gear