Breakthrough formula with Filloxane plumps up existing hair to increase diameter by up to 9%* & instantly create the look & feel of fullness. For all types of hair * Instrumental test. Measurement of hair thickness after 2 applications of product on bleached hair versus non treated bleached hair Directions for use: Use after other Cerafill products. Apply daily to damp hair section by section beginning at scalp. Massage gently at root & work through to the ends, re-apply for optimum results. Do not rinse. Layer any additional styling products. Style as usual.