FibroFelt is available in different grammages and thicknesses depending on the type. For example, the felt paper types WFDF and CFDF are available with 120 g/m² at 0.23 mm and 170 g/m² at 0.33 mm. In the wool felt and rag felt sector, versions with 500 g/m² at 1.00 mm and 510 g/m² at 1.00 mm, among others, are available. The suitable variant depends on the application area, desired impregnation, mechanical stress, and the structure of the end product.