Toppik Hair Building Fibers in Dark Brown is a 27.5g hair thickening solution that instantly creates the appearance of fuller, thicker hair. Made with natural keratin protein fibers, it seamlessly blends with existing hair to provide natural-looking coverage for thinning areas. Key features: • Made with natural keratin protein fibers • Instantly creates fuller, thicker-looking hair • Seamlessly blends with existing hair • Weather and wind resistant • Easy to apply and remove • Stays in place until next shampoo The product works through statically charged fibers that securely bond to existing hair strands. The dark brown shade is specifically color-matched to blend naturally with dark brown hair tones. The larger 27.5g size provides extended usage compared to smaller sizes. The fibers are resistant to rain, wind, and perspiration but wash out easily with regular shampoo. Suitable for both men and women looking to enhance hair density and cover thinning areas.