Product Features Pull-on closure Keeps feet warm For Scuba Diving or Snorkeling, but perfect also for Sailing, Boating, Surfing Hard rubber sole is ideal to walk on rocks, recommended for people that do Canyoning The back of the heel has a special design that fits with open hell fins Made in super elastic Neoprene to provide comfort. Available in thickness of 5 and 7 mm The sole is made by a strong rubber sole that is anti-slip, ideal for wet surfaces