Multi-purpose hair oil designed to fight frizz, add shine, and hydrate Our best-selling OI Oil delivers extraordinary softness, intense shine, and frizz control  in every drop. This multi-purpose hair oil hydrates, detangles, and enhances combability. The film-forming properties of the oil tame the frizz while the naturally rich anti-oxidant Roucou oil, contribute to protecting the hair from environmental stressors without weighing it down. Ideal for multiple hair tyopes—dry, damaged, frizzy, curly, or colour-treated —OI Oil is especially suited for medium to coarse textures. Whether used before styling or as a finishing touch, this hair oil leaves hair silky-smooth  and radiant with a warm, long-lasting fragrance for an indulgent experience. Trusted by professionals, OI Oil is your go-to for healthy, luminous hair—every day.