MOCSOCS Anti-Slip No-Show Half Socks PLAID One Size 4 Pairs (2Blk/Orng 2Gry/Red) 20% spandex 80% Polyester 20%Spandex. Premium quality material. Made in China. Mocsocs Provide The Best Fit and Function. Sock will NOT SHOW outside shoe and will NOT Slip off foot. Reduces perspiration.