Prolimit adjustable water sports helmet. Available in three adjustable sizes to make it easy for schools or equipment rentals. The size is clearly printed on the back of the helmet and, of course, also on the inside. All helmets are CE/EN certified for use in water sports. They have a very comfortable soft foam lining and a rubber chin guard. Adjustment is very simple, just by turning the solid knob on the back (ski/cycling/snowboard helmet style). Adjustable strap and noise-canceling ear pads. Ventilated helmet shell.