Designed for specialized floor cleaning and finish applications. Vertical polypropylene scrubber stripes remove stubborn spots and clean into tile grout lines. Dense 3 – 5 micrometer quality fiber removes more dust, dirt and microbes than conventional cleaning products. Advanced hook-and-loop backing… holds-up under harsh laundering conditions and attaches pads more securely. Durable pad construction… third party tested tough… withstands more than 300 launderings. Double finished edges retain mop shape with use over time