Why Use Oleo Radiance Shampoo? Treat yourself with TRESemmé Oleo Radiance collection, to illuminate your hair. This specialist solution system, infused with a unique lightweight blend of pure salon oils, instantly absorbs to help nourish hair from the inside out with a non greasy feel. For radiant and healthy-looking hair, everyday. This shampoo gently cleanses and nourishes hair, without weighing it down, so hair always looks and feels its healthy best.