These foam files dominate all conventional files. They have the special feature of being abrasive thanks to the particles of stone or carbon monoxide or aluminium that occur on the coating. They are also washable. As the mylar is a synthetic fabric and not paper, these files are washable and have different grits used by professional manicures. The grammar decreases from 80 large grains to 320 fine grains with shades of 120, 180 and 240 or a total of 5 grammar types. The coarse grain (120) is grey, the middle grain (180) is pale pink, the fine grain is sky blue (240) and the very fine grain is neon (320).