* sock is made of polypropylene fibres. * a thermal fibre, whose qua specific weight is the lightest available. * fibre is moisture resistant and moisture transportable. * sock has a mesh knitted backside for perfect fitting and comfort. *sock has an elastic top. * sock has a new anatomic foot for improved fitting andcomfort. * left-right system. * washable at 60 degrees, non bleed and availablein five sizes. * in many different colourcombinations available.