The world’s only vertical swimming aid, works for the youngest children who are taking to the water for the first time, to the seasoned swimmer who wants to improve stroke technique. Worn on the back, it gives the arms and body complete freedom of movement. This shark fin shaped buoyancy aid from SwimFin gives children a safe and secure feeling in the water and leaves their arms free to learn their swim strokes whilst inspiring imagination and play. Designed for children between the ages of 3-6 years of age up to approximately 30 kgs in weight. It should be worn high on the back above the centre of gravity. This way it will 'suspend' the child vertically in the water - it will not tip a child forward if worn correctly. The Swimfin never has to be inflated or deflated and no need for additional support.