Hair conditioning and composition therefor

A composition for conditioning hair comprising water having dissolved therein about 0.1 to about 2 weight percent of a quaternary nitrogen-containing polymer having a molecular weight between about 100,000 and about 4,000,000, said polymer being selected from the group consisting of a homopolymerized diallyldimethylammonium salt, a diallyldimethylammonium salt copolymerized with acrylamide, a cationic hydroxyethyl cellulose derivative having a chain of anhydroglucose units with substituent groups pendant therefrom and spaced along said chain, said hydroxyethyl cellulose derivative containing a plurality of quaternary nitrogen-containing groups, having from zero to 3 moles of said nitrogen-containing groups per anhydroglucose unit, a cationic guar of mannopyranosyl and galactopyranosyl units having 3-trimethylammonium-2-hydroxypropyl groups bonded to said mannopyranosyl and galactopyranosyl units, a copolymer comprised of about 80 weight percent polymerized N-vinyl pyrrolidone and about 20 weight percent N,N-dimethylaminoethyl methacrylate quaternized with dimethyl sulfate, and copolymers of acrylamide and N,N-dimethylaminoethyl methacrylate quaternized with dimethyl sulfate, and about 1 to about 5 weight percent of a water-soluble disulfide-containing dicarboxylic acid or salt thereof selected from the group consisting of dithiodiglycolic acid, 3,3-dithiodipropionic acid, and dithiodilactic acid and cystine, said composition having a pH value measured at 80.degree. F. of about 5 to about 8.