IMPORTANT- The Glider S-1 fits ONLY single glazed windows 0.1"-0.3". will not work If you have double glazed windows. For Hard to Reach Windows, the only safe way to clean the outside of windows, which are wider than your arm length. The Glider includes superior quality microfiber cloth - For perfect dry and shine windows. The Glider requires a short practice, for getting great results we recommend watching our video instruction. NOTICE - This is the ORIGINAL GLIDER - Beware from low-quality imitations.