Highly recommended at the entrance of all dairy and food processing areas, receiving rooms, laboratories—anywhere you want to limit the spread of contamination. Rubber fingers scrub shoe soles allowing contaminants to settle to the bottom undisturbed, while the shoe contacts clean solution only. Heavyweight mat stays put and solid rubber sidewalls will not sag. This is an industrial quality mat! New larger size can cover more of boot and is more effective on slanted surfaces.