HEAT MACHINE guarantees warmth with advanced thermal technology. HEAT MACHINE thermal insulated socks with a 2.3 Tog rating allowing for maximum warmth. Heat Machine uses triple brushed acrylic yarn providing a soft fleece lining, whilst also retaining the heat preservation attributes. HEAT MACHINE allows you to enjoy your favourite activities comfortably in Winter like hiking, skiing, cycling, football. HEAT MACHINE Socks are available in mens and ladies styles. Check out The HEAT MACHINE Range for all your Winter necessities.