The FibroidElastov filter mats are made of a robust polyester fleece and are therefore suitable for high Air flows. The mat has a progressive fibre structure, which maximizes its service life. The high inherent rigidity of the filter mats enables damage-free installation. The Filter medium is not wetted. The Filter mats are available in various ISO Coarse efficiency classes. This mat is available as a flame-retardant FireTex variant and can be used in accordance with the fire protection standard EN 45545.