Innovative Cooling fabric continually dissipates body heat for a comfortable sleep climate. This breathable fabric is cool to the touch and is a great solution for those who sleep hot. Lab-Certified Protection The laboratory certified H2PRO liquid proof membrane prevents fluids, NULLand NULL from contaminating your mattress. The quiet, vinyl-free barrier is designed to block out liquids and protect the top and sides of the mattress while allowing air to permeate for breathable comfort. Deep Pocket Design Sewn with deep pockets and an extra-thick elastic that encircles the entire lower hem of the skirt, this fitted sheet-style mattress protector goes on easy, has a smooth and secure fit, and accommodates mattress depths from 6 to 22 inches. Materials Cover: 55 percent polyester, 45 percent polyethylene Backing: 100 percent polyurethane Skirting: 100 percent polyester.