Fashion accessories: Get two pairs of self heating socks. Pain relief: Can also be used to relieve leg fatigue, pain and regulate the nervous system and blood circulation. Colours: Choose from white, red or black. Outdoor: Great for outdoor activities like skiing, snowboarding and hiking. Self heating: The bottom of the socks feature self heating tourmaline to warm and relax your feet in cold weather. Material: Made from polyester cotton and tourmaline. | 2 Pairs Self Heating Socks - Black | Wowcher