60% Polyester and 40% Viscose Derived from Bamboo Viscose Derived from Bamboo Blend Fabric: Made with 40% Viscose Derived from Bamboo and 60% polyester for a smooth, soft sleeping surface Waterproof Protection Layer: Laminated backing helps protect your mattress from spills, stains, and everyday moisture Breathable Woven Construction: Lightweight fabric promotes airflow for comfortable, everyday sleep Deep Pocket Secure Fit: Elasticized fitted skirt stretches to fit mattresses up to 18 inches deep and stays securely in place Machine Washable Durability: Designed for repeated laundering while maintaining softness and protective performance