Hair treatment compositions that include, based in each case on their weight, 0.1 to 20 wt % of at least one silicone having groups of the formula (I) as defined herein 0.1 to 20 wt % of at least one copolymer which includes monomer units of the formulae (V) and (VI) as defined herein and 0.5 to 5 wt % of 2-phenylbenzimidazole-5-sulfonic acid, possess an improved protective effect relative to UV radiation and endow the hair treated with them with enhanced combability, gloss, elasticity, brittleness and maximum tear resistance.
