doors carters for protecting engines or machine parts insulating elements for boots and similar equipment etc among these fabrics the felt ones are specially preferred among these fabrics the felt ones are specially preferred usually this type of fabric has a low resistance and therefore its use is limited this is specially true in the fire protection applications because any tear in the fabric would compromise its function the felt according to the present invention is prepared for example according to the process hereinafter described which is also a subject of the present application the pre anodized fibres in flocks are turned into veils through the carding process these veils are then needle felted so as to obtain the desired uniformity and solidity in the finished product the product 39 s solidity is a function of the number of veils the number of needles per square metres used and the number of beatings carried out in the needle felting process the higher the number of veils needles and beatings the more solid ans resistant the product will be the felts having an areal mass higher than 100 g m 2 are specially preferred preferred are felts obtained with a carding process in which at least 6 to 11 veils are created preferably from 7 to 9 veils per finished product and a needle felting process in which at least 5 000 to 10 000 needles per m 2 are used preferably from 7 000 to 9 000 needles per m 2 and at least from 400 to 800 beatings per minute preferably from 600 to 800 beatings per minute once.