A mixtures which contain (a) at least one phenylalkenal of formula (I) wherein R1 and R2 independently represent hydrogen, a methyl or phenyl group, R3 represents hydrogen, a phenyl group, alkenyl group or a linear or branched alkyl group with 1 to 5 carbon atoms, and the broken double lines independently represent a single bond or a double bond, and (b) at least one physiological cooling agent.