The Cooling Bamboo 3D Air Fabric Mattress Cover is a King size protector made from a blend of 38% Bamboo Charcoal Fiber and 62% Polyester Fiber. It is designed to provide a deep fit and features 100% waterproof technology, making it ideal for protecting your mattress from spills or stains. The breathable fabric also offers cooling and hypoallergenic properties, perfect for promoting a healthy and comfortable sleep environment. Machine washable for easy care, this mattress cover by BOSANE is a must-have for any bedroom.