Hair treatment agents include at least one quaternary ammonium compound according to formula (I), in which n denotes an integer from 10 to 24 and X− denotes an anion, at least one quaternary ammonium compound according to formula (II) in which m denotes an integer from 10 to 24 and X− denotes an anion, at least one quaternary ammonium compound of formula (III) in which R and R′ independently of one another each denote a saturated or unsaturated, linear or branched hydrocarbon residue having a chain length of 18 to 30 carbon atoms and X″ denotes an anion, and at least one cationic copolymer, including monomers of formula (IV) and monomers of formula (V) in which R1 to R9 independently of one another denote hydrogen or C1-4 alkyl (R6, R7, R8 or R9 denotes C1-4 alkyl), n denotes integers from 1 to 8 and A− denotes a physiologically acceptable anion
