MALOUF Sleep TITE PR1ME Smooth 100% Waterproof Hypoallergenic Mattress Protector with 15-Year U.S. Warranty - Cal King Size Protects against fluids, dust mites and allergens 100% waterproof with a fitted sheet style design that fits up to 22-inch mattresses Laboratory-certified H2PRO membrane allows air passage but repels liquids, ensuring a comfortable sleeping environment Smooth, breathable and hypoallergenic polyester fabric surface is noiseless, will not change the feel of your mattress and naturally wicks away moisture Great for asthma, eczema and allergy sufferers - vinyl, PVC and phthalate free