Enjoy full liquid protection with a polyurethane membrane that's equipped with microscopic pores to keep any liquid or spill out. Each mattress cover is made of high-quality jersey fabric, which is closely knitted with extremely fine needles, leaving a smooth and soft-to-the-touch feel. The mattress protector is equipped with long, stretchable corners that can fit mattresses that are up to 20 inches deep. To wash your mattress protector, simply pop it in the washing machine at 100° Fahrenheit. Don't iron or bleach it, just lay it out to dry or tumble dry on low.