This helmet is designed for canoeing, kayaking, windsurfing, rafting, hydrospeed and other similar water sports. Made from high density polyethylene with and adjustable plastic retention system. Offers protection against most high impact collisions, when used in accordance with the manufacturers specification. Adjustable CE approved helmet. Adjustable side-release buckle guarantees a clean and secure fit. Completely padded with EVA closed cell foam Up to 60cm