The Flex Air Sandpaper is specially designed system that reduces paper loading, and works exclusively with the Flex Air Dustless System. The paper features a coating called Stearation that makes the paper resistant to build up and loading of sanded material. The paper cuts evenly and lasts longer - sanding the surface even and smooth. Achieve a better finish with the Flex Air Dustless system. Features: Package of 10; Stearation coating eliminates loading and paper lasts longer; Great for general purpose sanding with a dustless advantage; 220 Grit for fine and finish sanding.