Id buy it again if I needed another. These are perfect though. With Fitflops look at the bottom of the sole picture, if the sole doesnt cover the entire bottom they are probably the slippery ones. Walked close by the microwave while it was on and wearing these and WOA! It would not be safe for me. I was surprised at first as the grip was slippery on the floor. The fit can be customized by using the included eargels. There? nothing more comfy and cute looking. Absolutely would not recommend. I have literally purchased socks made for mountain climbers, scientists in Siberia, skiers, hunters, etc and not one of these socks even come close to these heat holders!