Sonex Classic Colortec Acoustical Foam is the only acoustical foam offered by Sonex that is Class 1 Fire Rated yet colored throughout. Instead of simply painting the surface of the white foam like Sonex does with some of the other foams, Classic Colortec is actually dyed throughout. This allows for a much improved visual appearance to the foam since there is no white showing through paint or even any white exposed on the sides and cut edges. Sonex Classic Colortec features a modified enechoic wedge design for cost-effective and impressive sound control.