System 1 amplifies hair texture and protects hair against breakage. System 1 is specially formulated as a hair thickening treatment, delivering denser-looking hair. It reduces hair loss due to breakage and strengthens the hair, while refreshing the scalp and delivering a healthy shine to natural hair with light thinning. Features amp Benefits Complete professional thickening treatment for natural hair with light thinning For amplified hair texture and protection against breakage Helps remove follicle-clogging sebum, fatty acids and environmental residues from scalp and hair Refreshed scalp and increased hair volume Increased fullness of each hair strand 1 - Cleanser Shampoo 10.1 oz 1 - Scalp Revitalizer Conditioner 10.1 oz 1 - Scalp amp Hair Treatment 3.4 oz