Simple Elegance - Zippered Waterproof Mattress Protector, King polyester Elegant Home non woven polyester fabric mattress protector. Protects against bed bugs, dust mites and is waterproof. Pocket depth is 12" and it has a zipper fit closure. Easy care washable and dryable. Protect Your Bed from Bugs Waterproof Fabric Washable, Dryable Easy Care 100% polyester