Boys grow out of clothes so quickly that Richelieu designed Boys" Growing Socks. These innovative boys" socks have 2 sizes in 1 sock because of Grow Panel with extra stretch. So stock up on socks the super-economical way with this 4-Pack of Jersey Crew Growing Socks in black and gray. These jersey knit crew socks are made of a cotton/nylon/spandex blend for a great fit and cozy feel.