Disclosed is the Use of UV absorbers selected from (a1) diphenylacrylates and (a2) hvdroxyphenyl triazines of formula R1 is -O-R5 -COOR6 or -CO-NHR7 R2 is -O-R8 -COOR9 or -CO-NHR10 R3 is-O-R11-COOR12or-CO-NHR13 R5, R6, R7, Re, R9, R10, R11, R12 and R13 independently from each other are C1-C18alkyl R4 is hydrogen or hydroxy and x is 0 or 1 for stabilizing cosmetic compositions comprising an organic UV absorber selected from (b1) a benzophenone derivatives of formula R14 and R15 independently from each other areC1-C20alkyl C2-C20alkenyl C3-C10cycloalkyl C3-C10cycloalkenyl or R14 and R15 together with the linking nitrogen atom form a 5- or 6-membered heterocyclic ring n1 is a number from 1 to 4 when n1 = 1, R16 is a saturated or unsaturated heterocyclic radical hydroxy-C1-C5alkyl cyclohexyl optionally substituted with one or more C1-C5alkyl phenyl optionally substituted with a heterocyclic radical, aminocarbonyl or C1-C5alkylcarboxy when n1 is 2, R16 is an alkylene-, cycloalkylene alkenylene or phenylene radical which is optionally substituted by a carbonyl- or carboxy group a radical of formula or R16 together with A forms a bivalent radical of the formula (2a) wherein n2 is a number from 1 to 3 when n1 is 3, R16 is an alkantriyl radical when n, is 4, R16 is an alkanetetrayl radical A is -O- or -N(R17) and R17 is hydrogen C1-C5alkyl or hydroxy-C1-C5alkyl (b2) a benzotriazole derivative of formula wherein T1 is optionally phenyl-substituted C1-C12alkyl and (b3) a triazine derivative of formula , wherein is a radical of formula (4a) R17 and R21 independently from each other are hydrogen C1-C16alkyl or C6-C12aryl R18, R19 and R20 independently from each other are hydrogen or a radical of formula wherein, in formula (4a), at least one of the radicals R18, R19 and R20 are a radical of formula (4c) R22, R23, R24, R25 and R26 independently from each other are hydrogen hydroxy halogen C1-C18alkyl C1-C18alkoxy C6-C12aryl biphenylyl C6-C12aryloxy C1-C18al-kylthio carboxy -COOM
