This shoes is very comfortable for a shoe with a heel. They are reasonably flexible. They have a smoothly lined interior and seem well made. I ordered my usual size 8 in this and a Miz Mooz and had to send both of them back. The Miz Mooz was too tight. I exchanged the Miz Mooz for a size 9 and it fits. This Clark was too large, I returned it for a size 7.5 and it fits perfectly. Buying shoes online can be intimidating because of sizing, but Amazon makes buying shoes (with Prime) very easy and worry free.