hair building fiber is great for men and women with slightly thinning hair as it allows you to achieve more ambitious and creative styles. It makes fine hair appear thicker and provides a better foundation for your styling product to finish on. Your hair will no longer immediately fall flat or lose its shape over the course of the day. It amps up tiny fine hair, making it appear thicker and fuller and gives extra volume and body while leaving it flexible and natural-looking. It also lifts up limp hair and keeps it from falling flat or losing its form throughout the day.