The MultiZorber II offers the lightweight quality of foam with the acoustic performance of fiberglass. The new fabric front allows for greatly enhanced mid and high frequency absorption, along with a more refined look than the original MultiZorber. Features include:• 2? - 2 pcf density fiberglass with nylon sailcloth on the back and Guilford FR701 fabric on the front • Portable acoustic environment • NRC 0.90 against a wall or ceiling • NRC 1.35 as a free-standing baffle • No adhesive or impaling clips needed • For easy, damage-free-hanging on a wall, try the 3M Command Wire Hook, 5 lb rating (Model 17069) • Mounting options: offset from a wall, hang in free space as a baffle, install in a corner as a bass trap, hang from a ceiling • Class A fire rated, made in the USA