Wiper refill, designed and produced by Velgio, has a special Teflone surface protector, which infuse rubber-wiping element, which helps ensure a smoother, quieter wipe and longer life. Rubber refill - made of a rubber compound based on 100 per cent natural rubber, Teflone and 12 other chemical compounds with addition of graphite which improves friction factor and prevents noisy wiper operation. An unique technology of adding graphite on the compound level - rather than spraying it on the surface - eliminates any residue on the windscreen.