VanDuck Washable Reusable Mop Refills Compatible with Swiffer Wet Jet (Pack of 4) Put your existing mop pad aside. Now it's time to upgrade with innovative mop cleaning technology by getting much better quality VanDuck Refill. The thickest mop pad available nowadays on the market, includes: 5mm Foam in the middle, 2 layers of high quality microfiber (front and back), plus wide Hook&Loop holding VanDuck extremely tight to your lovely mop. MOP IS NOT INCLUDED.