Aqueous composition comprising 0.01 to 5% wt. of an alkyl-modified silicon which comprises at least one pendant alkyl group having a hydrocarbyl chain length of C6 or greater extending from at least one of the silicon atoms forming the polymer backbone, the composition additionally comprising a further silicone component comprising (i) from 50 to 95% by weight of the further silicone component, a second silicone which has a viscosity of at least 100,000 mm2/sec at 25 °C, and (ii) from 5 to 50% by weight of the further silicone component, a functionalised silicone and a method for reducing frizz.