The cool wool cotton quilt is a unique patented blend of wool and cotton (225gsm) fill and 300 thread count soft cotton sateen casing. made using airlight technologytm, the lightweight 2 layered wool cotton fill is designed to pull moisture away from the body, keeping you comfortable throughout the night. Wool and cotton together provide natural, healthy sleep while reducing overheating and perspiring. Because wool is a breathable fibre and cotton absorbs moisture, the combination regulates the body temperature throughout the night leaving you cool, relaxed and comfortable. suitable for those with allergies and asthma concerns. 5 year guarantee.