Redken acidic perfecting concentrate leave in treatment provides heat protection up to 230 degrees, smoothes, tames frizz, adds shine and intensely conditions to help to reduce hair breakage'. '.strtoupper('t')his ph balancing leave in treatment is specifically formulated with an acidic ph to help to defend against the potential negative effects that can be caused by hair colouring, lightening and heat styling'. '.strtoupper('t')he result'? '.strtoupper('h')air that looks and feels healthy'! '.strtoupper('t')o use use as a complete system with acidic bonding concentrate shampoo and conditioner'. '.strtoupper('a')pply to clean, damp hair'. '.strtoupper('l')eave in'. '.strtoupper('d')o not rinse'. '.strtoupper('s')tyle as usual'. '.strtoupper('a')void contact with eyes.