The special protective foil bag designed by GEWO protects any table tennis rubber against dust exposure. The handy foil bag prevents the sensitive rubber surface from becoming brittle due to exposure to atmospheric oxygen. After your match, clean the rubber with GEWO Fair Clean rubber cleaner and GEWO microfibre sponge. Put the head of the blade in the foil bag making sure to avoid air bubbles between the rubber and foil. Longer rubber life and preservation of properties.