Kids Flippers Material Gugmoy The fins of the brand are unique in design,novel in style,flexible in material,and made of high-quality silicone to increase comfort and safety. The sole is non-slip design Comfortable and soft without strangling the foot,and the convex surface at the bottom increases friction and anti-slip. Short Blade Designs Kids swimming flippers is design for swimming training,to build leg strength,added speed and endurance,easier to kick and less fatigue,helps swimmers maintain proper body posture during training. Scope of Application Our fins are suitable for children,beginners,boys and girl for swimming,snorkeling,training and diving. Flippers Size Please see size chart on left to find the correct fin size,if you are in between sizes,users with a wider foot should size up,otherwise we recommend sizing down for a tighter fit.