Utopia Bedding Bamboo Viscose Waterproof Pillow Protector Zippered (2 Pack) - Bed Bug Proof Pillow Encasement 20 x 38 Inches. This pack of two pillow protectors features viscose derived from bamboo for great comfort and a TPU coating for waterproofing. The zippered closure and double-stitched hem provide excellent protection. Easy to care for, they are machine washable and tumble dryable. The high-quality zipper completely seals the pillow, protecting against bed bugs and dust mites.