1Its microfibers stay firmly in place through wind, rain and perspiration for longer-lasting results. 2Made of natural and non-toxic ingredients, it has no stimulation and does no harm to your hair and won't clog pores. 3The fibers blend undetachably with your existing hair, instantly making it full and thick. 4It just takes a short time to take effect, perfect for dating, working, traveling, etc. 5The hair building fibers work with all hair types and textures.