OI is Davines' award-winning line built around Roucou oil, a beta-carotene-rich extract from the Amazonian Achiote plant. Every product in the range is powered by this single antioxidant ingredient, which smooths frizz, restores shine, and shields hair from heat, UV, and everyday environmental stress.

The result is softer, glossier, more manageable hair from the very first use. OI works across all hair types and is especially loved by anyone dealing with dryness, coarseness, frizz, or color-treated strands that need extra care. Each formula is sulfate and paraben free, and finishes with OI's signature warm, long-lasting fragrance.