High copper content is injected into the fabric, we have copper content test report in the fabric of professional institutions.RELIEVE : Helps to relieve from Arthritis, rheumatoid,Swelling,Tendonitis ,muscle stiffness and soreness. Our provide mild compression for warmth that increases blood circulation, which ultimately reduces and promotes healingPROPER COMPRESSION: Our copper arthritic gloves provide gentle and correct compression that will really help you stay from while all your daily work done.COMFORTABLE: Our compression gloves are made of high quality Copper fiber cloth, very comfortable to wear, excellent in sweat absorption and breathability. This is extremely important that you can wear it all night or all day.colour: blackMaterial: Copper fiber clothSize: 20x15x1CMPackage Contents:2 x half knuckle glovesOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.