This hat is structured with a classic fit, flat brim, and full buckram. The adjustable snap closure makes it a comfortable, one-size-fits-most hat. 80% acrylic, 20% wool Green Camo is 60% cotton, 40% polyester Structured, 6-panel, high-profile 6 embroidered eyelets Plastic snap closure Green undervisor Head circumference: 21⅝″–23⅝″ (54.9 cm–60 cm) Gunner Gear's guiding principles - Everything we do must be able to pass the three tests below: Mission Statement: To be the leader in promoting loyalty in our nation, the military, and our families. Vision: Every American will proudly celebrate and defend the freedoms of our great nation. Values: We foster honor, loyalty, and respect in all we do.