"Rotofelt Covers are used to protect padding from constant abrasion as the rolls turn tightly against the chests. They protect the linen from the coarseness and irregularities of the padding. They keep dirt from the padding and prevent particles from adhering to the linen being ironed. They hold the padding assembly in proper position. Rotofelt Covers are 13.3 OSY and are a blend of aramid and polyphenol sulfide with a resin treatment to impart stiffness. The cover has a scrim cloth and is made exclusively for Tingue."