Topically applicable sunscreen/cosmetic compositions well suited for the SPF synergistically enhanced photoprotection of human skin and/or hair against the damaging effects of UV-irradiation, particularly solar radiation, comprise synergistically UV-photoprotecting effective amounts of each of (a) at least one bis-hydroxyphenylbenzotriazole sunscreen compound and (b) at least one second sunscreen compound which comprises at least two benzazolyl functional groups per molecule and/or at least one sunscreen compound which comprises at least one benzodiazolyl functional group per molecule, formulated into a topically applicable, cosmetically acceptable vehicle, diluent or carrier therefor, advantageously formulated as an oil-in-water emulsion.