Great fun for kids of all ages, the strong, flexible strip beneath the sole of these amazing shoes lets you jump and bounce to your hearts content; A great way to have loads of fun getting fit, these shoes can help strengthen muscles and improve co-ordination. The shoe size can be adjusted for a good fit for you. Fun exercise, run faster, jump higher. Shoe sizes 4.5-6. Water resistant. years and over. (not included) plus . WARNING(S): Not suitable for children under 3 years old. Only for domestic use.