Pro-Tec * Ace Wake Rescue * High Density Injection Molded ABS * Dual Density Waterproof EVA * 16 Open Vents for ventilation and drainage * Full surround interieur * " Head Lock "- ajustable rear fit system * removable cupping ear guards with water channels * available in : small=53-54 cm. / medium=55-56 cm. / large=57-58 cm. / xlarge=59-60 cm. * Matte Rubber Black * esspecially made for the Military and Police.