Fibertex is a mat made of nylon fibers, which is mixed with fine abrasive particles to smoothen the base. The kit includes 3 different mats: Dark brown: For gentle deburring on new skis or newly stone ground skis before waxing. For refreshening base without disturbing structure. Light brown: To be used before waxing to remove oxidized layer to open base. White: For polishing after waxing and brushing.