DOLPHIN helmetMost of the helmets used for water sport activities might hurt users neck and jaws when big quantities of water get into the helmet. The pressure and tension between the head of the user and the helmet, because of the water in between, is very dangerous. Ocean Protection helmets WATER DRENAGE SYSTEM (WDS) design, just does not let water enter inside and evacuates fast and easily any little water in. The liner design is so studied thelmet any head