This is genuine OEM Shark XFF680 Foam and Felt filter set for the Shark Rotator Lift-Away Speed Models. These filters are both washable, with the circular foam filter capturing large debris, and the felt filter capturing smaller microscopic particles. Shark recommends washing these filters once ever 30 days, and replacing them every 6-12 months. Homes with Allergy Suffers or Asthmatics should replace them more frequently. Fits the Shark Powered Lift-Away Speed Models; NV680, NV681, NV682, NV683. Genuine Shark Filter. It's important to only use genuine Shark Filters while your vacuum cleaner is under warranty, as use of cheaper generic filters will void your generous warranty from Shark.