Love these sandals!  We use them for water play, mostly.  I love that they stay on and protect our sons feet.  He is 10 and wears the same size shoes as me.  I told him I was taking these when he outgrows then!  Haha!  No blisters have been an issue or even chafing and they stay on well.  My favorite feature about these is that the heel is somewhat adjustable.  I say somewhat because there is a pad in the middle, but they are able to easily be adjusted.  That is great since bought them a little big!  They survived multiple creeks and rivers in Oklahoma, Ohio, and New Mexico.  Great sandal!  Will buy again!