VO5 Curl Defining Hair Mousse with Lasting Hold and Less Frizz 200ml. Looking to achieve flawless, frizz-free curls? Look no further than VO5 Curl Defining Hair Mousse. Designed to be used before air-drying, this curling mousse helps control frizz and provides all-day definition and hold, enhancing your hairs natural shape. Containing heat-defence properties, our mousse also helps protect your hair from damage whilst hair drying and heat styling.