The HWB 6 Panel Mesh Back Trucker Hat is a cool and comfortable option for hot sunny summer days. • Structured, 6-panel mid-crown • 47% cotton, 25% polyester, 28% nylon • Stiff fabric-reinforced front panels • Mesh back • Permacurv curved visor and color-matched bottom • Plastic adjustable closure • Crown 9 cm (3 ½") • Head circumference: 55-60 cm (21 ⅝”-23 ⅝”)