Copper Fit Pro Series Back Support with Hot/Cold Therapy 89% polyester / 11% spandex Imported High-quality, copper-infused fabric provides lower back support and targeted relief while designed for maximum comfort and mobility Reusable, hot/cold beaded gel pack provides temperature therapy to help promote healing and reduce inflammation Straps for adjustable and form fitting compression Unisex: Contoured, slim and lightweight design fits discreetly under clothes Copper ions bound to the fiber level during manufacturing help reduce odors