Size: Adjustable back closure, suitable for most head sizes (closure circumference: 22-24inches / 55-60cm). Material: Trucker hats for made of polyester. The fabric is soft and comfortable, and the brim is strong and textured. The back of the hat uses encrypted PC mesh, which has good ventilation function. Sun Protective: Classic hat, fitted design, this hat blocks the sun and keeps the comfort of all day wearing, Cooling mesh back makes it very breathable. On those hot days, wearing this comfortable hat can protect your skin from UV rays and protect your hair and eyes. Adjustable & Breathable: Adjustable size snapback strap, soft inner sweat band lining, mesh backing for great ventilation, light weight. The structured shape keep you wearing for long time without deformation. Any Occasion: A fashion style that goes with any outfit. It is perfect for casual, hip-hop, running, sports,baseball, football, basketball, street dancer, summer beach activities, out with friends, costume parties or any other occasions. suitable for any season. One hat fits most comfortable everyday fit. Adjustable double-breasted design on the back, freely adjustable cap size and a secure fit at all times. The unisex design makes it suitably perfect for both men and women. It not only keeps the sun away from your eyes, but also serves as a fashion style to embellish your life.