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 truly classic – and this also is offering an athletic touch The cap is the typical 5-panel shape and the iconic mesh back for optimum ventilation of the head The cap It has a plastic fastening making it easier for you to fit the head size 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.