Features performance sock with integrated heating element you don’t notice ideal for narrow feet heating elements of the latest generation which completely incorporate the toe area toe region and balls of the foot are heated optimal moisture transportation ergonomically knitted additional shin protector padding on the exposed parts ring bandages for optimum support on the foot the lithium packs are easy to attach by means of press studs on the legband machine washable at 30°c compadible with Lenz lithium packs 700 / rcB 1200 / rcB 1800