Hair cleansing composition

1. An aqueous hair cleansing composition comprising:

(a) greater than 0 to about 12% by weight of at least one alkyl poly glucoside;

(b) greater than 0 to about 10% by weight of at least one betaine compound;

(c) about 0.2 to about 5% by weight of at least one acyl amino acid; and

(d) at least one surfactant selected from the group consisting of sodium cocoyl isethionate and sodium lauroyl methyl isethionate;

wherein the composition is clear, has a viscosity of about 1500 cP to about 20000 cP, and is free of sulfates and ethoxylated fatty esters.

2. The composition as claimed in claim 1 , wherein the composition has a pH of about 9 or less.

3. The composition as claimed in claim 1 , wherein the composition has a pH of between about 8 and about 4.5.

4. The composition as claimed in claim 1 , wherein (a) is present in an amount of from about 2 to about 10% by weight, based on the weight of the composition.

5. The composition as claimed in claim 1 , wherein (a) is present in an amount of from about 5 to about 10% by weight, based on the weight of the composition.

6. The composition as claimed in claim 1 , wherein (b) is present in an amount of from about 1 to about 10% by weight, based on the weight of the composition.

7. The composition as claimed in claim 1 , wherein (b) is present in an amount of from about 3.5 to about 7.5% by weight, based on the weight of the composition.

8. The composition as claimed in claim 1 , wherein (c) is present in an amount of from about 1.5 to about 3% by weight, based on the weight of the composition.

9. The composition as claimed in claim 1 , wherein (a) is lauryl glycoside.

10. The composition as claimed in claim 1 , wherein (a) is coco glucoside.

11. The composition as claimed in claim 1 , wherein (a) is decyl glycoside.

12. The composition as claimed in claim 1 , wherein (b) is cocoamidopropyl betaine.

13. The composition as claimed in claim 1 , wherein (b) is lauryl betaine.

14. The composition as claimed in claim 1 , wherein (c) is a glycine or alanine based amino acid and has a salt ion of sodium or potassium.

15. The composition as claimed in claim 14 , wherein (c) is sodium cocoyl glycinate.

16. The composition as claimed in claim 14 , wherein (c) is potassium cocoyl glycinate.

17. The composition as claimed in claim 14 , wherein (c) is sodium cocoyl alanine.

18. The composition as claimed in claim 1 , wherein the at least one surfactant is present in an amount great than 0 to about 10% by weight, based on the weight of the composition.

19. The composition as claimed in claim 1 , wherein the at least one surfactant is sodium cocoyl isethionate.

20. The composition as claimed in claim 1 , additionally comprising at least one ingredient selected from the group consisting of conditioning agents, pH adjusting agents, preservatives, antioxidants, fragrances, and mixtures thereof.

21. The composition as claimed in claim 1 , wherein the composition includes less than about 3% by weight of emulsifiers, polymers, thickeners, and hydrocolloids, based on the weight of the composition.

22. A method of cleansing hair, comprising applying a composition according to claim 1 to hair.

23. An aqueous hair cleansing composition comprising:

(a) greater than 0 to about 12% by weight of at least one alkyl poly glucoside;

(b) greater than 0 to about 10% by weight of at least one betaine compound;

(c) greater than 0 to about 5% by weight of at least one acyl amino acid; and

(d) greater than 0% to about 10% by weight of at least one surfactant selected from the group consisting of sodium cocoyl isethionate and sodium lauroyl methyl isethionate;

wherein the composition is free of sulfates and ethoxylated fatty esters.

24. The composition of claim 23 , wherein

(a) is selected from the group consisting of lauryl glycoside, coco glucoside, and decyl glycoside;

(b) is selected from the group consisting of cocoamidopropyl betaine and lauryl betaine; and

(c) is selected from the group consisting of sodium cocoyl glycinate, potassium cocoyl glycinate, and sodium cocoyl alanine; and

wherein the composition is clear.

25. The composition of claim 23 consisting essentially of:

(a) about 2 to about 10% by weight of at least one alkyl poly glucoside selected from the group consisting of lauryl glycoside, coco glucoside, and decyl glycoside;

(b) about 1 to about 10% by weight of at least one betaine compound selected from the group consisting of cocoamidopropyl betaine and lauryl betaine;

(c) about 0.2 to about 5% by weight of at least one acyl amino acid selected from the group consisting of sodium cocoyl glycinate, potassium cocoyl glycinate, and sodium cocoyl alanine; and

(d) about 2.5% to about 7.5% by weight of at least one surfactant selected from the group consisting of sodium cocoyl isethionate and sodium lauroyl methyl isethionate.

26. The composition of claim 1 wherein the composition is free of thickeners.