This Velosol Cycling Bar 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 • 60% cotton, 40% polyester • Hard buckram front panels • Mesh back • Permacurv visor, matching under-visor • Plastic adjustable closure • 3.5" crown (8.9 cm) • Head circumference - 21 5/8" to 23 5/8" (54.9 cm to 60 cm)