These are all natural cotton socks (they call them booties, but they are socks) to put on over foot cream. I use them at night after lathering on my favourite cream (burt's bees coconut foot cream, that is). I like that they are lower cut than your average sock making them easier to get on when your feet are all gooey with cream. They are the perfect size and they dry really fast too.... I wash them out by hand and leave them to air dry during the day.