Outer fabric 1 40% polyester CVC twill – GSM. Outer fabric 1 60% cotton CVC twill – GSM. Outer fabric 2 100% polyester – GSM Snap closure The Trucker Caps are real classics - and this also offers a sporty touch The cap offers the typical 5-panel shape and the iconic mesh back for optimal ventilation of the head. The cap is adjustable with a plastic closure and can be adjusted to the head circumference The cap combines the continuous, reinforced front and the mesh back with the sporty 5-panel shape and high-quality cotton twill upper. Outer fabric 1: 60% cotton, 40% polyester. Outer fabric 2: 100% polyester. One size fits all.