This six-panel trucker cap with a mesh back will be a comfy and classic choice for a perfect day in the sun. Structured, mid-profile, six-panel cap 47/25/28 cotton/polyester/nylon Hard buckram front panels Mesh back Permacurv visor, matching under-visor Plastic adjustable closure 3-1/2" crown Head circumference - 21 5/8" to 23 5/8"