Achieve voluminous and fuller-looking hair with Hairology Natural Keratin Hair Thickening Fibers. Specially formulated with natural fibers and oat protein, this product helps thicken and add luster to fine, thinning hair while effectively concealing the scalp. The easy 2-step process involves applying the hair thickening fibers and then using the hair fiber holding spray for long-lasting results. (Please note that the setting spray is sold separately). Each package contains .19 oz of hair fibers, providing ample product for multiple applications. Say goodbye to thinning hair and hello to a more confident and fuller hair appearance with Hairology.