Polo Ralph Lauren Solid Rib Pima Cotton Wool Dress Sock (8100). The Polo Ralph Lauren Solid Rib Pima Cotton/Wool Dress Sock 8100 has a dress weight ribbed body in solid colors with Polo pony logo on leg. Polo Ralph Lauren's Solid Rib Pima Cotton/Wool Dress Sock 8100 is made of cotton/nylon/wool.