Created from the most naturally occuring wool source, Not only is this product safe to use but it can save you hundreds of pounds against expensive hair treatment and medication. Hair Building Fibers are nearly identical to human hair, blending naturally and undetectably. Other Keratin fibers are derived from lower-grade sources like fish bones, nails and hoobes, making their texture and appearance lack in comparison to our top most quality. The natural The Keratin used by our product has an innate static charge that holds the fibers to any hair type. Imitators made of cotton,plant-based materials and rayon do not have this natural static charge. Consequently, there is nothing attracting them to your hair, so they tend to clump, shift, fall to your scalp and look Un-natural. Meanwhile the fibers stays intact and in place, laches on and intertwines to your existing hair. Why wait... Get fuller, thicker-looking hair right away . For best results we recommend using our fiber hold spray to keep your look throughout the day and giving you protection against wind & rain until you next shampoo your hair.