Experience silky-smooth hair with TRESemmé Keratin Smooth Deep Smoothing Mask. This rinse-out hair treatment is formulated with hydrolysed keratin and marula oil, offering up to 72 hours of frizz control and 5 smoothing benefits. It detangles knots, boosts shine, adds softness, and tames flyaways, leaving your hair gorgeously radiant and smooth while retaining its natural movement. For optimal results, use after TRESemmé Keratin Smooth Shampoo and Conditioner. Apply evenly through damp hair, focusing on the mid-lengths and ends. Leave on for 3-5 minutes, then rinse thoroughly.