Quilted Waterproof Microfiber Bed Bug Hypoallergenic Mattress Pad/protector HLC (King) Protect your mattress from liquids and stains with the best mattress protector Smooth polyester top layer is soft and comfortable under sheets 100% polyester microfiber with polyurethane laminated. Polyester Skirt. Suitable for Asthma & Allergy. Protects against Dustmites & Bed Bugs. Breathable, Waterproof Membrane. Anti-microbial Treatment. Machine washable. Deep pocket fits up 16" mattress.