Alessi The Five Season MW64 1 F Design Fragrance Diffuser Leaves, Mahogany Wood, Brrr. Design replacement leaves for MW62 diffuser. Designer: Marcel Wanders. Material: Mahogany wood. Dimension: Height 21 cm. In place of the traditional reeds normally used, the five seasons room diffusers feature elegant stylised leaves; five special new designs for fragrances that bring added style to interiors.