100% Cotton Unisex mesh flat brim baseball cap, provides a lightweight and comfortable wear. Cotton Fabric: Breathable sweat-wicking fabric. Adjustable fitted strap closure, one size fits most head sizes. Also embroidered eyelets on the side allow for air to pass through to help keep your head cool and reduce sweating. Stylish, Versatile Comfort a?? Ideal for adventures outside, including Rally, campaign, travel, hiking, camping, sports, fishing, golfing, and much more.