These black opaque tights are a style must-have. These tights are made from a unique yarn that cleverly improves your own circulation by reflecting the infrared rays you emit back into your body. They are knitted with graduated compression, which is clinically proven to keep your legs feeling energised, younger and healthier. Our Body Sensor technology is designed to keep you warm when it's cold, and cool when it's warm. ,Style: Perfect for indoors and outdoors,Added stretch,Care and composition: Composition: 90% polyamide, 9% elastane lycra and 1% cotton, Care instructions: Machine washable