The Nioxin System 2 Scalp Care Hair Thickening Shampoo Conditioner Set includes a standard size bottle of shampoo and conditioner, as well as a thickening treatment. The products contain ingredients such as Niacinamide, Salicylic Acid, Peppermint Oil, Menthol, and Panthenol to boost density and thickness in natural and untreated hair. This set is part of the Nioxin Pro Clinical System 2 line and is dermatologically and clinically tested, making it a reliable choice for unisex use. The peppermint scent adds a refreshing touch to the hair care routine.