hair allowing a tighter grip on the hair strands, making it harder to brush off and form a resistant film. This allows users to comb or brush their hair, as well as apply heat from a blow dryer without the mousse leaving the hair stiff. Cationic resin is often blended with another film former to give a firmer hold on the hair. In order for this to be successful, the polymer chosen must be nonionic in nature and should be compatible with the cationic resin. Emulsifiers are used to help blend the product creating foam. Mousses do not require long-lasting foam stability. Ideally, the foam will break down immediately once worked into the hair. Other added ingredients in various hair mousses, such as vitamins, silicones, sunscreens, and dyes, tend to assist in additional functions for the hair mousse product, such as providing an additional conditioning component. Certain brands contain alcohol, which is suitable for most hair types except dry. References Hair care products