This is the 7th pair of Merrell zero drop or barefoot shoes I have purchased - need I say more? I bought my first pair because they minimized the look of my size 9.5 feet, and that they would pack better for travelling. However, it is the functional differences that have kept me coming back. I have not had one bit of trouble with planters fasciitis since I started wearing these, and I find I no longer have a sore back at the end of the day when I wear them. They feel a little snug on the toes, but they do not bind or cause cramping.