Inov8 Thermo Socks
Inov8’s new neoprene sock designed for winter running when the temperature is cold and underfoot conditions are wet. Extreme Thermo Sock acts as an insulating layer allowing water in and holding it there. The water then heats up and keeps the feet warm, in exactly the same way as a wetsuit. This would be a great option for Winter endurance running / OCR like / .