schwarzkopf BC pH 4.5 colour freeze sulphate-free Micellar Shampoo is a gentle formula for colour-treated hair, that brings hair to its optimal pH 4.5 level to perfectly freeze colour pigments. The shampoo lightly cleanses your hair without compromising its colour. Added UV filters protect hair from damaging ultraviolet radiation so that every single strand is protected from Colour fade day after day. As it is sulphate free, This shampoo produces less foam than standard shampoos and it's also suitable as a post colour Shampoo for dry, porous and damaged hair. Comes in 1000 ml.