100% Twill Cotton front,100% nylon mesh back,lightweight smooth and durable. Adjustable Buckle Back Closure, One size fit all (head circumference:55-59 cm) High Quality Professional Custom Print Unisex Trucker Hat,will not fade in daily wearing or cleaning, suitable for everyday wearing. Perfect to wear while doing light exercises such as walking, cycling, playing golf ect,for attending sport events, sunbathing at the beach or lake, for boating, camping. 100% satisfaction guaranteed:If you??re not happy with your purchase, let us know and we are pleased to provide a replacement or refund.