These are a great boot compared to others I've tried. They are quick and easy to get on and off, keep my feet warm and don't slip on the ice too much. My feet stay dry!. There is a removable insert that will probably not last near as long as the boot. I haven't looked into seeing if that insert can be replaced or not. I believe it is made of felt so you know it won't last long with your socked foot sliding in and out. The price was great too.