Didn't have these for DS1 (now 4) but am thinking that they would be useful for our hols in France in a month's time, as last year the edge of the pool was really slippy, and also the beach was stoney (and sand was hot!).
But would I use them again at all afterwards? They will likely have grown out of them by next year.
Alternatively, anyone got any boys size 11 and toddler boys size 6 you want rid of??