Composition for enhancing keratin fibers

A hair treatment composition consisting of:

• a stand-alone hair conditioner, or a stand-alone rinse-off conditioner, or a stand-alone leave-on conditioner, or a stand-alone mask of components a-g wherein:
• a) component a is a C3-C13 linear saturated dicarboxylic acid substituted with one hydroxyl group wherein the dicarboxylic acid is present at a weight percentage concentration of from about 0.05 wt % to about 15 wt %;
• b) component b is a C10-C30 mono-unsaturated fatty monocarboxylic acid at a weight percentage concentration of about 0.01 wt % to about 10 wt %;
• c) component c is a C10-C40 saturated or unsaturated linear or branched hydrocarbon at a weight percentage concentration of about 0.01 wt % to about 1 wt %;
• d) component d is a fatty acid mono-ester of the C10-C30 mono-unsaturated monocarboxylic acid and a C3-C6 triol esterifying alcohol, the fatty acid mono-ester being at a weight percentage concentration of about 0.1 wt % to about 10 wt %;
• e) component e is a cosmetically acceptable aqueous or aqueous-organic medium at a weight percentage concentration of from about 20 wt % to about 95 wt % relative to the total weight of the hair treatment composition and the aqueous-organic medium comprises from about 50 wt % to about 99 wt % water relative to the total weight of the medium;
• f) component f is one or more cationic surfactants selected from the group consisting of one or more C14-C30 linear alkyl amines quaternized with three methyl groups;
• g) component g is one or more optional additives and is selected from the group consisting of a linear or branched, saturated or unsaturated fatty C12-C30 alcohol, a polyethylene glycol a cationic polymer, a preservative, a UV protectant, a viscosity control agent, a humectant, an emollient, an emulsifier other than an anionic surfactant, a hair strand thickener, a pH adjuster, a chelating agent, an anti-dandruff, an anti-fungal, an anti-microbial, an anti-itch vitamin E, phenoxyethanol, ethylhexyl glycerin, a fragrance, a pigment, a colorant, an essential oil, a natural extract, and any combination thereof;
• wherein each of the dicarboxylic acid and the fatty monocarboxylic acid in the stand-alone hair conditioner or stand-alone leave-on conditioner or stand-alone rinse-off conditioner or stand-alone mask independently consists of the free acid or a cosmetically acceptable alkali metal or alkali earth metal salt thereof;
• and
• wherein a weight percentage ratio of dicarboxylic acid to fatty monocarboxylic acid comprises about 2:1 to about 10:1;
• and,
• wherein all weight percentages are relative to the total weight of the hair treatment composition except as otherwise recited.