When Tetris players close their eyes, all they see is falling blocks. This is a real phenomenon studied by scientists, who call it the Tetris effect. If you want the effect of having people imagine you when they close their eyes, try a pair of these cool Tetris socks for men! Fits men's shoe sizes 8 to 13. 60% cotton, 36% polyester, 2% spandex. Made in Korea.