- High density injection molded ABS - Dual Density Waterproof EVA - 16 open vents for ventilation and drainage - Full surround interior - "Head Lock" - adjustable rear fit system - Removable cupping ear guards with water channels - 4 sizes / 2 shell breaks - CE EN 1385 Water Sport Safety Standard SIZES: S (53-54cm) M (55-56cm) L (57-58cm) XL (59-60cm)