Isoglass is a material of 100% fibre-glass, cured in a heated mould. Higher tool costs, but it gives the best acoustic performance. Enables variable thickness for better noise-absorption and for cut-outs and assembly. Toplayer can be a non-woven or a textile. Backing is a PES non-woven. The parts are very rigid and provide an aspect of luxury. Weight can vary from 800 gr/m² to 1500 gr/m².