Product Description Anti-gravity volume powder with matte finish. Give hair lift, thickness and a matte finish with American Crew Boost Powder. This weightless powder adds grit for dramatic, gravity-defying texture. And, it can be layered with virtually any other American Crew styling product. BENEFITS Propylene Glycol: Retains natural moisture and softens hair. Silica Silylate: Provides flexible hold and thickens hair. Citric Acid: Revitalizes and restores hair.