I live in Hawaii, where our house is not heated, and in winter it can get below 60 F in the house.  We normally are barefooted, but in winter, these slippers are ideal for keeping my feet warm.  Winter is also when you get more centipedes, so wearing slippers prevents you from getting bitten.  I had another kind of slipper with fuzzy parts over the top, but looked kind of sissyish.  These work for me.