My son was excited to have and wear these shoes but I was completely unthrilled, because they have a strong, headache-inducing chemical smell.  I definitely couldn't stand to have them on the same floor of the house, and could even smell them from a floor away.  I was so grateful that the dinosaur thrill wore off after a few days, maybe a week, and he doesn't want to wear them any more - I think they're not very comfortable.  So now they live wrapped in plastic and unused. I gave them two stars instead of one for the period of time where my son was insisting the smell didn't bother him and he really wanted to wear them.  But I wouldn't buy them - or any other shoe that calls itself synthetic! - again.  I should have known the price was too good to be true.