Dry hair can cause more frizz, so keeping your hair healthy and hydrated is a must for anyone looking for smoother, shinier hair. TRESemm Keratin Smooth Conditioner is specially formulated to moisturise hair while helping to control frizz for up to 72 hours.*As part of the TRESemm Keratin Smooth collection, this moisturising hair mask packs five smoothing benefits into one: fights frizz, detangles knots, boosts shine, adds softness and tames fly-always. Use weekly for hair that 'ssilky smooth and full of natural movement.