This bamboo viscose waterproof mattress protector is built for people who sleep hot but still want serious protection. An upgraded TPU waterproof backing helps block spills, sweat, urine and everyday accidents, while the fabric above keeps airflow and softness intact. The surface is 3D Air Fabric made from 40% rayon derived from bamboo and 60% polyester. It promotes airflow and wicks moisture through the night, helping reduce heat buildup in warm bedrooms instead of sealing it in the way plastic covers do. It stays quiet, too — the smooth surface helps absorb sound rather than crinkling, so turning over does not wake you. The deep-pocket fitted skirt stretches over the top and sides of the mattress, fitting depths from 8 to 21 inches including memory foam, hybrid and pillow-top beds. Machine wash cold with similar colors on a gentle cycle and tumble dry low; no bleach, iron, dry cleaning or chlorine detergents.