Ive been wearing crocks for years. Replaced a fleece lined pair with this pair. Arrived yesterday and was very disappointed in the cheap platic like outside. The fleece inside is thin and poly like. I would return these, but I wore them outside. The plastic like outside is also going to be very slippery in the winter. I'll probably end up wearing indoors like a slipper-but the cheap poly lining makes my feet sweat. Very Disappointed!!!