The Shark Fin Swimfin is revolutionizing the world of swimming aids and is rapidly gaining popularity. Thanks to Swimfin, children achieve a horizontal position in the water without compromising the freedom of movement of their arms and legs. The deeper Swimfin is submerged, the more lift the child receives to maintain a horizontal swimming position. As the fin slowly emerges from the water, it provides only as much lift as necessary. In a perfect floating position, the lift is negligible. When in a vertical doggy paddle, the fin is completely submerged, providing a secure grip, which is especially important for beginners. In conclusion, the more Swimfin surfaces, the less lift it provides. This unrestricted swimming aid is suitable for both non-swimmers and advanced swimmers.