Slumberdown White Waterproof Protect Mattress Protector in Size Double, Sports Direct. The Slumberdown Waterproof Protect Mattress Protector offers reliable protection while preserving the comfort of your mattress. With a soft-touch quilted surface and a discreet waterproof layer beneath, it guards against spills, sweat, and stains—making it ideal for children, allergy sufferers, and everyday peace of mind. The breathable design helps regulate temperature throughout the night, while the deep fitted skirt ensures a secure fit on most mattress depths. Durable and machine washable, this protector is a practical solution for extending the life of your mattress and keeping your bed fresh, dry, and hygienic. Sizes Available: Single – 90cm x 190cm, Double – 135cm x 190cm, King – 150cm x 200cm, Super King – 180cm x 200cm Top Fabric: Soft-touch quilted polyester Backing: Waterproof polyurethane layer Protection: 100% waterproof and stain-resistant Fit: Deep fitted skirt (fits mattresses up to approx. 30cm deep) Breathability: Breathable membrane for cool, comfortable sleep Care Instructions: Machine washable at 40°C, tumble dry on low heat Hypoallergenic: Made with non-allergenic materials Usage: Suitable for everyday use on all standard mattressesLooking for alternatives to stores like JD Sports, eBay, SHEIN, ASOS, Next, Best Choice UK, Very, Decathlon UK, Argos, schuh, Temu, BuyBetter, or Nike Official? Discover our unique selection.