No. 17 Copper Coat Evening Primrose Oil Shampoo is a dye-free henna-free shampoo which brings out the warm brown, blonde, and copper highlights in blonde through dark red coats.While named “Copper Coat,” this shampoo can be used by all blonde, brown and red haired dogs to support truly rich color. Works by placing a copper enhancer (suspended by the oil within the shampoo) into the coat. Contains no dyes or henna so it will not dry the coat. A dose of Evening Primrose Oil maintains the skin and coat's moisture balance, while optical enhancers refract light off the coat and radiate shine.