American Crew Anti-Gravity Volume Matte Finish Boost Powder 0.3 Ounce 10 Milliliters American Crew Boost Powder is an anti-gravity volume powder with a matte finish that thickens your hair and provides lift. This weightless powder adds grit for a dramatic, gravity-defying feel. Propylene Glycol holds natural moisture and softens your hair while citric acid restores and revitalizes the hair.