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 ...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