Infused with Biotin, known to provide hair with strength, and Hyaluronic Acid, known to hydrate hair, this double-duty thickening styling spray provides heat protection and reduces hair loss due to breakage. This Lightweight plumping spray with a flexible feel leaves no dulling residues as it thickens hair overall by 200%* and provides heat protection. Vegan-friendly formula Silicone-free *when using PROfiller+ Shampoo, Conditioner & Spray vs. basic shampoo. How to use Spray throughout towel-dried fine hair, making sure to fully cover the root area and under sections. Comb to distribute evenly from root to tip. For maximum fullness, style hair using a blow-dryer until completely dry.