Toppik Hair Building Fibers in Light Brown are cosmetic hair thickening fibers designed to conceal hair loss and instantly create the appearance of fuller hair. These microscopic fibers, weighing 55 grams, are made from organic keratin proteins that match the natural composition of human hair. They seamlessly bond with existing hair through static electricity and adhere securely without being visible. Application is done by shaking the bottle over thinning areas and gently tapping to evenly distribute the fibers. The product is resistant to wind, rain, and sweat when used with Toppik Fiberhold Spray, ensuring all-day hold without flaking, irritation, or transfer. It can be easily removed with any shampoo. The ingredients include keratin, ammonium chloride, silicon, and DMDM hydantoin, as well as possible colorants such as Yellow 6, Yellow 5, Red 22, Red 33, Blue 1, Green 5, Green 3, Green 6, and Orange 4. This unisex product is suitable for adults of any gender and provides a naturally looking solution to enhance hair volume and boost self-confidence. For optimal results, it is recommended to use dry, styled hair, and accessories like the Toppik Spray Applicator and Hairline Optimizer may be considered. The medium-sized container offers practical, reliable performance for daily use in beauty and care routines.