I bought this flip flop after developing plantar fascitis on my right foot and I tried many sandals and this flip flop is the best,  My heel doesn't hurt even after walking in them for miles and as a result of having to wear these I don't feel the nagging aches in my kneees any more. I have narrow flat feet and these flip flops fit perfectly, they are not like regular flip flops because you don't have to keep trying to keep them on, they stay on because of the way the footbed is shaped. I love these flip flops, most other crocs are too wide for me but these are just perfect. I even bought a second pair for my 12 year old son, who had the misfortune of inheriting my feet, kids sizes are too small for him and the men's are still too big for him, and he loves them as well.