Leifheit micro duo wiper cover for floor wiper Twist: with its 2-fiber system it offers the double cleaning power. The special bristles stick out a little bit and take the dirt out of every gap. They reach every hollow in structured surfaces. The micro fibers have microscopically small gaps to remove the whole dirt and the water. Wiper cover micro duo is washable at 60 degrees and does not loose its cleaning power even after repeated washings.