The interesting thing about the PIAA Super Silicone Wiper Refill is their stated claim that using the wiper with this refill is like swiping your windshield with a Rain-X-like product. PIAA claims that this wiper will apply a water repellent thin film to the windshield with repeated use. May be a marketing gimmick, but time will tell. (Note: I do like the Rain-X product on the windshield. The results are absolutely amazing!)