HEY-SIGN ceiling object WAVE is available in 45 colors and three sizes: S 80 cm, M 100 cm, and L 120 cm. The module is made of wool felt pieces shaped into waves supported by two black metal rings. WAVE can be flexibly mounted on existing ceiling constructions at various heights with the use of its solid steel rope attachments. Like other models in this range, the frames are hardly visible, almost completely covered with 3 mm of felt. The materiality of the felt is the most noticeable aspect. When viewed from the bottom, the wave-like structure looks especially striking, adding a purifying aesthetic to WAVE's acoustical capabilities.