If there is copper infused into the thread, shouldn't your fabrics have a copper-gold color? Do you

The infused copper particles are microscopic and are too small to be seen with the naked eye. To see any copper, the fabric needs to be placed under a microscope. While copper on its own is a great conductor of electricity, the copper in our products is infused into the thread. The bulk of the material is still made out of electrically insulating fabric, and so the concentration of copper is insufficient to affect the conductivity of the product.