* made of high quality Marfil Active, high quality Marfil Shingo and Marfil Standard. * the Marfil Active yarn ensures high stretch ability and gives a perfectfit. * the high quality Marfil Shingo yarns in the foot, guarantees a maximum transport of perspiration and a comfortable soft touch. * the strong Marfil Standard yarns gives the sock strength, high durability and is 100% color fast. * left-right system.