My son has had a pair of these every summer since he was 6mos old. The sole is flexible enough for developing feet and arches while the design allows for great toe protection. My son climbs, runs, jumps, does all the things all over the yard and at the lake in these. They fit true to size. Son loves the fun colors. They hold up amazingly well. I still have last year's and they're in near perfect condition so will be passed on the little brother.