Hyleory California King Size Waterproof Mattress Protector Viscose Made From 40% Viscose Made from Bamboo(more Breathable) 60% Polyester (Softer) Cooling Breathable Viscose Made from Bamboo Surface: Our mattress protector is made of 40% viscose made from bamboo and 60% polyester through a unique channel weave structure, which enhances the cool feeling while facilitating air flow so that heat can be easily discharged. On the other hand, it also enhances the abrasion resistance of the fabric, making the viscose made from bamboo fitted sheet durable Waterproof Noiseless: The TPU material used in the back of the waterproof mattress protector can stop all liquid intrusion, so that your mattress is always dry. It is noiseless, you can move it at will without making any sound that will disturb your sleep 3D Air Fabric: Our mattress pad cover is made of 3D air fabric, which is more breathable and softer than other materials, the mattress protector provides you with a dry and comfortable sleeping environment, enjoy a comfortable night with our mattress protector Deep Pocket 360Elastic Skirt: Say goodbye to sliding sheets, our deep pocket mattress protector fits mattresses or air mattresses from 8 to 21 inches, the sturdy elastic skirt and 360 full wrap around design ensure this mattress protector hugs every corner of the mattress, stays flat and avoids shifting Machine Washable Easy Care: Cold water separate machine wash, convenient and fast. Do not dry clean, iron or use bleach. When washing, make sure the mattress cover is unrolled with waterproof backing facing in. Do not use laundry balls to avoid damage to the TPU backing.We suggest you buy 2 pieces or more, so you can change one while wash the other