Pirology natural hair Fiber in seconds makes your hair look fuller and thicker natural Hair Building Fibers of colored keratin protein, blend undetectably with existing hair strands to instantly create the appearance of naturally thick, full hair. For men and womenDon’t use any hairspray prior to shaking well over thinning areas hold the bottle 45 degrees close to the head, and gently part hair to disperse fibers lightly over the shining area until the areas are completely covered. (Do not shake the bottle up and down heavily). Style as usual for greater durability, and follow with PirStyle hair spray for better effect. PirStyle fibers resist wind, rain, and perspiration but remove easily with shampoo. Close the bottle tightly and store it away from moisture when not in use. Warning. For external use only. You can apply this product if you are suffering from hair loss and/or patchy. Do not use.if your scalp is red, inflamed, irritated or painful.If your degree of hair loss is different