Guaranteed to add at least 10% fullness to your hair after the first application, JASON Thin To Thick Extra Volume Shampoo gently and thoroughly cleans your hair and purifies your scalp. Hair is left shiny with added volume and bounce.Featuring mild botanical cleansing agents and natural alpha hydroxyl acids, JASON Thin To Thick Extra Volume Shampoo delivers noticeable results after the first use. This pro-vitamin shampoo is kind to skin, and will leave your hair full of life, healthy and shiny.Directions of use:Apply onto wet hair.Gently massage shampoo into hair and scalp.Rinse and repeat if desired.Follow with JASON Thin To Thick Extra Volume Conditioner.