Wrist Double Action Support with Thermal Copper Insulation by Sabona of London.
Sabona of London make support garments that will add support and warmth to muscles and joint areas
Their elasticised supports have 5% copper thread (Thermal Copper Insulation = TCI) knitted into the fabric. TCI is woven into a special blend of fabrics. The copper in the TCI conducts natural body heat, and as the body warms the copper, it in turn retains the heat generated and stores it within the fabric.