A hair conditioning composition comprising from about 0.1% to about 20% of a lipid being one or more unsaturated fatty material selected from a group consisting of an unsaturated fatty acid； an unsaturated fatty alcohol； an unsaturated amine； an unsaturated amide； and an unsaturated phospholipid； wherein the molecule of said unsaturated fatty material comprises a linear or branched carbon chain with 8 to 24 carbon atoms, and one carbon-carbon double bond in a position of the said carbon chain between position C3 and position omega for the unsaturated fatty acid or unsaturated amide and between position C2 and position omega for the unsaturated fatty alcohol, unsaturated amine or unsaturated phospholipid and wherein the Log P of said unsaturated fatty material is less than 7； and 0.1% to 20% of one or more lipid enhancing agent selected from the group comprising of a fatty acid monoester of a polyol wherein the molecule of the fatty acid component of such monoester contains a linear or branched carbon chain with 10 to 22 carbon atoms and wherein the fatty acid monoester of a polyol has a log P of less than 7； a saturated fatty alcohol wherein the molecule of the fatty alcohol contains a linear or branched carbon chain with 8 to 22 carbon atoms； an ester of a saturated fatty alcohol wherein the molecule of said ester contains 10 to 44 total carbon atoms； an alcohol wherein the molecule of such alcohol contains an aromatic ring.La présente invention concerne une composition de conditionnement capillaire comprenant d'environ 0,1 % à environ 20 % d'un lipide étant un ou plusieurs matériaux gras insaturés sélectionnés dans un groupe constitué d'un acide gras insaturé ； d'un alcool gras insaturé ； d'une amine insaturée ； d'un amide insaturé ； et d'un phospholipide insaturé ； la molécule dudit matériau gras insaturé comprenant une chaîne de carbone linéaire ou ramifiée avec 8 à 24 atomes de carbone, et une double liaison carbone-carbone dans une position de ladite chaîne de
