OLAPLEX No 4 Bond Maintenance Shampoo. Formulated with OLAPLEX Bond Building chemistry. Restores internal strength and moisture levels to add incredible shine and manageability. For all hair types. This Product is also Vegan, DEA Free, Aldehydes Free, Formaldehyde Free, Sulfate Free, Nut Free, Gluten Free, Cruelty Free, Paraben Free, Phthalte Free, Phosphate Free, PH Balanced.