I really like these Crocs, my 1st pair of their ballet flats. They're quality-made and flexible. I was worried that the rubber might rub the back of my heel, but it doesn't at all. They fit true to size, not tight, but not so loose they fall off. The only downside to these flats is that unlike many other styles of Crocs, they only have 2 tiny air vent holes near the arch of the foot, meaning my feet got sweaty a lot faster than with my other style of Crocs. All in all, I really like them!