Sweat Watch Cap - 100% Cotton Olive Green The back of the head is tucked, creating a relaxed, slouchy silhouette just by putting it on. Made of sweat material with some stretch, this hat can be worn comfortably without constricting your head. 100% cotton is gentle on the skin, making it safe for those who are sensitive to synthetic fibers. With its gentle material, it's perfect for everyday wear as well as for use as a medical cap. Thank you for considering.