100% Cotton Cover With Polyester Fill 100% Cotton Cover: Quilted 300 thread count cotton surface delivers a soft, smooth feel while maintaining natural breathability Waterproof TPU Protection: Laminated backing helps guard against spills, stains, and moisture to extend the life of your mattress Polyester Filled Cushioning: Plush fill adds a layer of comfort without excessive bulk for balanced support Deep Pocket Secure Fit: Elasticized fitted skirt stretches to accommodate mattresses up to 18 inches deep and stays securely in place Durable And Machine Washable: Designed for everyday use and repeated laundering while maintaining structure and performance