Up to 70% thicker nails in 4 days (Measured layers of nail protection)! What it is: Advanced thickening treatment that boosts soft, thin and ridged nails. How it Works: Our exclusive calcium and ceramic gel formula builds a hard shield, helping protecting your nails against bending and breaking. Seals and reinforces, filling in ridges and imperfections. The Results: Thicker, harder and stronger nails. Salon tested. 1-800-953-5080 (USA/Canada only). sallyhansen.com. America's No. 1 nail brand. Made in USA.