FULL & PLUSH ROOT AMP ROOT LIFTING SPRAY MOUSSE Having trouble getting volume right at the roots? Root Amp is a target action spray mousse with extreme volumizing power that builds all day mega-lift at the roots with no sticky weigh down. HOW DOES IT WORK? Formula with cotton flower extract combines the body-building power of a mousse with the precise, easy application of a spray to build volume where you most need it. So light and powerful, it creates root lift in an instant without filmy residue.