TRESemm? Dry hair can cause more frizz so keeping your hair healthy and hydrated is a must for anyone looking for smoother, shinier hair. TRESemm? Shampoo is specially formulated to moisturise hair while helping to control frizz for up to 72 hours. this moisturising shampoo packs five smoothing benefits into one: fights frizz, detangles knots, boosts shine, adds softness and tames fly-always. Use weekly for hair that?s silky smooth and full of natural movement