This mattress pad is made with rayon from bamboo. The top fabric is 60% Polyester and 40% Rayon from Bamboo. Boasting more breathability than most other fabrics, the Rayon from bamboo material provides a natural cooling effect. In addition to helping regulate body temperature, this mattress cover is super 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. Imported.