They are not slippers or socks they are Snoozies! Snoozies are foot coverings that are the best of both socks and slippers, made of brushed fleece exterior, lined with soft Sherpa fleece inside, and with a non skid sole so you won't slide around on wood or tile floors. Snoozies will keep your feet warm even on the coldest days. Also great for warm weather climates where air conditioning keeps floors cold. Women in particular are prone to cold feet due to the way their bodies react to cold temperatures. Snoozies are the perfect remedy! Machine washable.