Add shine and softness with this styling set of four OI products for fine hair.Add shine and softness with this styling set of four OI products for fine hair types Add luxurious body and shine to fine, thin hair with our OI Styling Set. This set includes four products from our best-selling OI line: OI Shampoo, OI Conditioner, OI Hair Milk, and OI Hair Butter. Four beautifying hair products made with Roucou oil to give you your best hair days yet.