The First Responder Water Helmet in Small/Medium size and Hi-Vis Yellow color is designed for rescue professionals to respond quickly and safely to emergency situations. This light-weight and comfortable helmet complies with CE 1385-2012 water helmet standard.Features. Hi-impact ABS shell. Accessory side rails and NVG/Go Pro mounting bracket. 9 Ventilation vents. Close cell EVA molded foam liner for comfort and safety. Ratchet easy-fit system. Chin cup webbed strap adjusts to fit. Removable foam ear protection padsSpecifications. Color: Hi-Vis Yellow. Size: Small & Medium. Head Circumference: 21-22.5. Weight: 1.45 lbs