The Sheridan Factory Outlet Single Layer woollen underlay has a plush wool pile which adds an extra comfort and protection to your mattress. Wool is a natural fibre that regulates body temperature whilst you sleep. This underlay is the perfect option for those who love the natural properties of wool. It features a fitted skirt to ensure minimal movement throughout the night.Cover: 100% Australian Wool PileFill: Backing: 100% PolyesterCore: Skirt: 60% polyester, 40% cotton Note: For health and hygiene reasons, pillows, quilts, underlays, bed toppers, mattress and pillow protectors cannot be returned for a refund or exchange unless faulty or not as ordered.