Great protection for your mattress. This is a truly high-performing pad. Made using nanotechnology, the fabric resists water and stains while retaining 100% of its natural feel. The process is not a coating and will not wash out. This mattress pad is 100% cotton. It has 100% polyester fill, polyester backing and a Stretch-to-Fit polyester sidewall. Resists stains and water Fits mattress up to 21" Stretch fit sidewall Features: Stain Resistant, Deep Pocket Bed Size: Twin Base Material: 100% Polyester Mattress Pads & Toppers Type: Mattress Pads Country of Origin: Imported