The Powersocks Heat Fusion Uni are unisex heated ski socks. Technical, soft and breathable, they efficiently wick away moisture thanks to their specific micro-channel construction. These heated ski socks also provide maximum comfort in the sensitive areas of the foot, namely the shin, calf and instep. These heated ski socks come with a pair of S-PACK 700 batteries, designed to give you up to 8 hours of warmth during your days in winter sports. This set contains: 1 pair of Powersocks Heat Fusion Uni ND socks 2 S-PACK 700 batteries Tech and Specs Up to 8 hours of heat USB charging cable included USB mains charger not included Breathable socks with a tight fit Quick and easy to attach the batteries with snaps. Heel and toe reinforcements Heat Fusion technology: for all-around diffusion and heating of the toes. Compatible with all Therm-ic heated socks Composition: 49% Acrylic 27% Polyamide 10% Merino wool 12% Polypropylene 2% Elastane