This top-selling cooling mattress pad is made with rayon from bamboo. Boasting more breathability than most other fabrics, the rayon from bamboo provides a natural cooling effect. In addition to helping regulate body temperature, this mattress cover is extra plush elevating your mattress to new heights. It’s filled with cluster fiber trapping air inside the pockets of the mattress pad to keep its shape. The result is a soft, thick, and luxurious mattress topper for your bed.