Ergonomically shaped Odourless Pleasent to the skin Soft seams Optimal moisture transportation Additional shin padding Ring bandages for optimal support on the foot Machine washable at 30°c Lenz Sock Fabric Composition: 54% polyester 29% nylon 7% merino wool 5% polypropylene 5% spandex Lenz Sock Washing Instructions: Remove batteries from the socks before the washing and drying process Lenz Heater Socks can be washed in the washing machine on a LOW setting (ensure the batteries are removed before washing) Allow to dry at room temperature; Do not dry the Lenz Heater Socks in a dryer or on a heating element Once fully dry re-insert batteries to ensure warmth for your next wear Package does NOT include battery - sold separately Explore our full range of Lenz heated products