SBR rubber backing has 20% recycled content. Available in smooth or cleated backing. 3/8'' Thickness. As foot traffic passes over the mat, the Waterhog surface scrapes larger particles while the adhesive insert captures smaller dust and dirt. With two footsteps on Clean Stride adhesive insert, over 90% of dirt particles are removed. Clean Stride mats provide highly effective dirt and dust removal methods for factories, computer rooms, warehouses, school gymnasiums, health care facilities and more.