The ULTRAfiller+ Thickening Spray gives fine, flat hair an instant thickening boost for hair that looks—and feels—thicker, fuller, and stronger in just one use. This expertly formulated hair plumping spray thickens hair overall by 200%*. Featuring a blend of Biotin, known to provide hair with strength, and Hyaluronic Acid, known to hydrate thin hair. This double-duty styling spray provides heat protection up to 220°C and reduces hair loss due to breakage. This lightweight hair thickening spray with a flexible feel leaves no dulling residues. Its made with a silicone-free and vegan-friendly formula.*When using ULTRAfiller+ Shampoo, Conditioner & Spray vs. basic shampoo.