Studiofoam Pro is a melamine-free acoustical foam with a Class A fire rating, per ASTM E84*. With a slim 1.5 thickness, Studiofoam Pro offers all the traditional benefits of Auralexs industry leading Studiofoam including durability & affordability while also offering outstanding acoustical performance with an overall NRC of 0.90. Studiofoam Pro presents a low-cost option for sound absorption in churches, restaurants, clubs, professional settings and other venues that require Class A fire-rated acoustical treatment. Due to our proprietary chemical formulation, Studiofoam Pro has all the traditional benefits of Auralexs industry-leading Studiofoam, including outstanding durability due to reduced oxidation. Studiofoam Pro will not rot, crumble or suffer surface harm from normal use like other Class A alternatives such as melamine are reported to. Plus, its more affordable! Studiofoam Pro is available in two sizes: 2 x 2 and 2 x 4, both 1.5 thick. It is charcoal gray and features beveled edges similar to the elegant SonoFlat and ProPanels. The Backstory Since we became involved in acoustics decades ago, weve known that the Holy Grail of acoustical treatments was the invention of a version of Auralex Studiofoam that would yield our excellent absorption characteristics AND a Class A fire rating. Weve worked with the chemists for years and years on this concept, but until now had never been able to come up with the magic formula. Now we have.