Systems, compositions, and methods for treating keratinous substrates

A rinse-off composition comprising:

• (a) an anionic surfactant system comprising:
• i) from about 4% to about 15% by weight, relative to the total weight of the rinse-off composition, of a first anionic surfactant chosen from sodium cocoyl isethionate, sodium lauroyl isethionate, or a mixture thereof, and
• ii) at least one second anionic surfactant;
• (b) from about 0.01% to about 5% by weight, relative to the total weight of the rinse-off composition, of coco-caprylate/caprate;
• (c) at least one cationic compound chosen from at least one polysaccharide-based cationic compound, at least one cationic silicone compound, or a mixture thereof;
• (d) from about 7% to about 15% by weight, relative to the total weight of the rinse-off composition, of at least one alkypolyglucoside;
• (e) from about 0.01% to about 7% by weight, relative to the total weight of the rinse-off composition, of at least one amphoteric surfactant;
• and
• (f) water.

A conditioning system comprising:

• (a) at least one anionic surfactant chosen from isethionate surfactants, present in an amount ranging from about 90% to about 99% by weight, relative to the total weight of the conditioning system;
• (b) coco-caprylate/caprate, present in an amount ranging from about 0.05% to about 3% by weight, relative to the total weight of the conditioning system;
• and
• (c) at least one cationic compound, present in an amount ranging from about 0.5% to about 5% by weight, relative to the total weight of the conditioning system.

A method for cleansing the skin, hair, and/or scalp, said method comprising applying to the skin, hair, and/or scalp a composition comprising:

• (a) an anionic surfactant system comprising:
• i) a first anionic surfactant chosen from isethionate surfactants, and
• ii) optionally, a second anionic surfactant;
• (b) coco-caprylate/caprate;
• (c) at least one cationic compound;
• (d) at least one additional surfactant chosen from non-ionic and amphoteric surfactants;
• and
• (e) water;
• wherein the coco-caprylate/caprate is present in the rinse-off composition in an amount ranging from about 0.05% to about 3% by weight, relative to the total weight of the rinse-off composition.