Ok a year and a half ago I got a foot massage from hell. I thought my heel was bruised but it hurt like hell and didn't get better. I limped around and that screwed up the rest of the foot and then my other foot over the next 16 months. I started wearing these April 1 2018 and after less than six weeks my feet feel almost completely back to normal. Also, since I went barefoot on wood floors all the time I had cracked heels. Nothing ever made then go away. But since my feet hurt so bad I wore these slippers constantly unless at work. Ok for the first time in thirty years no cracked heels. Just a bonus. I will never stop wearing these bad boys they are like walking on air.  They are well used and dirty but they machine wash and still hold up. Thank you, worth every penny.