Inspired by yu-su-ru, an ancient Japanese bathing ritual, the Shu Uemura Izumi Tonic Strengthening Conditioner is a lightweight, fluid formula that lends rich hydration to lacklustre lengths. Powered by tonic water from the Japanese Izumi, the conditioner helps to visibly strengthen and thicken the strands, while smoothing the hair to impart a natural-looking radiance. Boosting manageability and hydration, hair appears weightlessly smooth and glossy when using the full Izumi Tonic routine.