Magnum Speed Socks Properties: Universal socks from Magnum with antibacterial fibers: PROLEN SILTEX and PROLEN BODYFRESH. The design takes into account the specificity of trekking shoes, places of increased pressure on the foot and places where abrasions occur. Please note: socks should be washed at a maximum of 40 degrees Celsius. They should not be tumble dried. Product features: Sizes: 36-39, 40-43, 44-47 Material: 33% polyester, 33% viscose, 17% polypropylene, 10% polyamide, 7% elastane Manufacturer: Magnum