The bamboo blend fabric is silky to the touch and reduces hot spots. The top quilting is extra plush for a more comfortable night of sleep. This mattress pad is perfect for a mattress that runs hot such as TempurPedic. Our bamboo mattress pad uses a bamboo fabric specifically known for its breathability. The mattress pad top is 70% polyester and 30% rayon. The polyester supports mattress pads' stretchiness and durability. The bamboo mattress topper is filled with plush, supportive synthetic cluster fiber. Cluster fiber is a highly innovative polyester material that goes through an extra engineering process to create a network of fiber that "traps" air to allow the pad to keep its shape longer and allows more airflow than any other mattress pads on the market.