The FIVE 5IDED + OMNIPHASE & TENCEL Mattress Protector is the most advanced mattress protector on the market. It incorporates three technologies- TENCEL fiber, OMNIPHASE material, and the patented H2PRO membrane- to create a moisture-wicking, temperature-regulating, and 100% liquid-proof mattress protector. The combined benefits of these technologies mean you will sleep comfortably and dry with five sides of protection for your mattress.