There is provided herein a method of treating thermally and/or chemically damaged including the following steps: contacting thermally and/or chemically damaged hair with a hair treating composition comprising a aminosilicone of the general formula (I): MDxD&prime；yM&emsp；&emsp；(I) wherein: M=R1R22SiO1/2 D=R22SiO2/2, and D&prime；=R2R3SiO2/2, and where R1 is an alkyl group having 12 to 50 carbon atoms, R2 is a substituted or un-substituted hydrocarbon group having 1 to about 6 carbon atoms, R3 is 3-aminopropyl group and/or a N-(2-aminoethyl)-3-aminopropyl group, x has a value of 1 to about 2,000, and y has a value of 1 to about 50.
