Socks

They slide over feet, and go inside shoes. Yes, socks(often abbreviated "sox") keep the feet warm. But one might say a little TOO warm. Not only are the footwarmers in a manner of speaking, they also act as a barrier between one's feet and shoes. On the downside, you can slip/slide on some floors specifically because of socks. Out of 11 socks, socks recieve 9 socks.