HELIKON-TEX Baseball Vent Cap Black Cotton, Nylon Comfortable, breathable and lightweight. One size fits most. ID Hook and Loop panels. Front Hook and Loop panel: 9x5cm (3.5"x1.9") Front Hook and Loop panel: 9x5cm (3.5"x1.9"). Top Hook and Loop panel: 6x5.5cm (2.3"x2.1") Rear Hook and Loop panel: 4.5x4cm (1.5"x1.7"). Hook and Loop adjustment strap: 8x2.5cm (3.1"x0.9") Material: 60% Cotton, 40% Polyester Ripstop. Weight: 75g