Diane Perfect Beauty Extra Scalp & Volume set pairs a 450 mL shampoo with a 450 mL treatment in the brand's red faceted bottles. This line is designed for a lighter, root lifting finish that helps hair look airy and bouncy while still caring for the scalp and lengths. Japanese listings describe it as the volume focused option in the Diane range, with a clean citrus and tea fragrance that feels fresher than sweet. It is best for shoppers who want a daily shampoo and treatment set for flat hair instead of a heavy moisture or repair routine.