E-Z Flow Leather Markers are waterbased and offer breakthrough technology in the design of a new valve and applicator system. Just a couple of pushes on the valve, and the marker is ready to use. The sponge applicator flows effortlessly to spread color evenly every time, no matter how large or small of a spot is being restored. The color lays flat, with no ridges between the rows, blending seamlessly with the surrounding area. The screw-on top provides an air-tight seal so the applicator stay wet and ready for your next repair.