These keratin-enriched products revitalize weak, damaged, thin or thinning hair to create stronger, more manageable hair. The Hair Fattener is formulated without sulfates and parabens and safe for colour-treated hair. Our Hair Color Thickener covers up thinning areas and scalp show-through. Transform your look with the help of thicker-looking, healthier hair. The Toppik FiberHold Spray is a fine mist designed to strengthen the bond between Toppik Hair Fibers and your existing hair, producing longer-lasting results.