A Long Life Filter Bag is now available for all of the new Festool Sanders: RTS 400, DTS 400 and ETS 125 Sanders. These durable bags are comprised of extra-durable nonwoven polyester for extra-long life. This new bag fits on all three newer models, as well as previous models of the RTS 400, DTS 400, and ETS 125 Sanders. These bags are meant to capture sanding dust, be emptied, and then be reused many times.