Make the most out of your mattress with this reversible waterproof underlay from Onkaparinga. Australian wool Fully reversible – cotton cover on reverse Waterproof layer Machine washable Oeko-Tex screened for harmful substances Experience year-round comfort with the added protective layer of the Onkaparinga Reversible Waterproof Australian Wool Underlay. Stay warm in winter and cool in summer when you sleep on the finest, cotton-backed Australian wool. Featuring a waterproof layer to protect your mattress from moisture, you’ll be sleeping in comfort in no time.