This neoprene swim jacket from Zoggs swimwear has fixed buoyancy and is a great way for nonswimmers to enjoy the water without fear of sinking. It has a front zip and velcro fastening for easy fitting. buoyancy/floatation jacket designed to allow complete freedom of movement in the water. The jacket style fit means your child"s arms and legs are free to move and also allows the development of natural swimming strokes. Please note this ia a buoyancy aid and not a life saving device.