Toppik pump spray evenly coats thinning hair in specific areas with a precise application. In order to replicate the front hairline's natural shape, Hairline Optizie was created with irregular teeth. 1. Twist and remove the sifter to unscrew the Hair Fibers cap. Attach the Hair Fibers bottle to the Spray Applicator by screwing it on. Hair Fibers are dispensed by applying pressure to the Spray Applicator pump. For a hairline that looks natural, use Hairline Optimizer. Code of Product: 667820200272