A mid insulated Heat Ready sock made with merino wool. The AV50 is ideal for skiing or general outdoor actives where you want the feel of a traditional sock but with the Heat Ready feature. Heat Ready makes it possible for you to boost your personal comfort with added active heat if the sock is used together with the Inuheat One Powerpack. Features: Heat Ready Technology: Heat Ready Heating System consists of laminated polyester PU-panel with a coated stainless steel heating conductor, plastic connector with metal rivets and an NFC tag. Material: 44% Merino Wool 44% Acrylic 11% Polyamide 1% Elastane Activitied: Skiing, hiking, general outdoor activities Manufactured: Portugal and Sweden A mid insulated Heat Ready sock made with merino wool Specifications: Brand: Arctic Volt Model: AV50 Heat Ready Black & Grey