The Classic Soccer Referee Sock is so popular that even the competition has tried to duplicate it... without success! The composition of this sock, 64% nylon, 6% Spandex and 30% cotton, gives referees all the comfort they need. The Spandex prevents the sock from sliding down - no more pulling your socks up in the middle of the game or dealing with straps to hold your socks up! The padded foot gives you the comfort you need while running and the elasticized ankle band and foot bed provide added support. Try it, you will never buy another brand again!