Three sizes in one! This is a quality boot children can grow into!Richmond Young High Rider comes with two extra insoles - take one out to make a boot a half-size larger. Take out the other to make it a full size bigger. Also a useful feature for Winter when kids might appreciate an extra pair of socks! This elegant and stylish boot has Mountain Horse's Stirrup Control System incorporated in the sole for superb grip and stability when combined with the SCS3 stirrup. Elastic laces at the instep allow the foot to flex while the full-length rear zip makes fitting easy. Aergozone shock-absorbing technology cushions the foot while a steel shank provides stability.Boots equipped with SCS3 Grip can be used with all other conventional stirrups/treads on the market. When used with conventional treads, it will function safely and feel like any other riding boot. However, Mountain Horse recommend the use of SCS3 Grip stirrup treads with the SCS3 Grip boots to maximise performance of the system.Please note: These are not allowed under Pony Club rules which state boots must have a 'smooth sole'.