You can't watch a kid stomp a puddle in these without getting a bit jealous.  The sole is very textured and helps wobbly ones stay on their feet when it gets slick.  No leaks and these have been worked over pretty good.  The ankle area is definitely the hardest dimension to fit.  I went up a size to make sure they fit through winter.  Just used bulky socks at first to help the fit.  I sure do wish they had handles on the top to help leverage the foot in.  The kid is almost two and the size 9 fits pretty good now.