100 natural Only 5 seconds makes thin hair thick everyday It can be removed easily with shampoo No side effect Remove the cap and position bottle over your head holding it at a 45degree angle Gently tap the fibers over your hair until the thinning areas are no longer visible and you are satisfied with the fullness and volume of your hair Gently Pat the fibers to blend them into your natural hair Doing this will make the Hair Building Fibers completely undetectable Just use a little bit of hair locking spray for added control If you need to remove hair fibers from your hair just wash the product out with shampoo It is really that easy