The invention relates to a mousse composition comprising: a) a base composition comprising: (i) from 0.0001 to 5 wt. % of a lactam; (ii) from 0.1 to 10 wt. % of an alcohol; and, b) a propellant; and to the use of a combination of a lactam with an alcohol, in a mousse composition to collapse the resulting mousse foam quicker; and to the use of a combination of a lactam with an alcohol, in a mousse composition to make the resulting mousse foam easier to rinse.