Top Fabric 100% Cotton Sleep on a Cloud: This Bedsure twin XL mattress pad (39" x 80") is filled with 450 GSM microfiber to preserve your mattress's lifespan, ensure enhanced pillowy comfort, and transform your bare dorm into a cloud-like sleep space. Featuring Bedsure's signature microfiber filling blend for extra softness and optimal support. Breathable & Moisture-Wicking: The 100% cotton fabric cover offers natural breathability and moisture-wicking properties, making it perfect for warm days while providing an incredibly soft touch.