Primacoustic Nimbus Acoustic Ceiling CloudThe Primacoustic Nimbus is a high performance ceiling cloud designed to hang from the ceiling and capture ambient energy by absorbing sound as it hits the face of the panel, all while trapping powerful reflections from the ceiling on the back side of the panel. The Nimbus is made from 1. 5" (38mm) thick high density 6lb per cubic foot (96 kg m) glass wool that is completely encapsulated with micromesh and resin hardened edges. The acoustic panel is