Mats world's best outdoor mat, a clean interior begins at the front door with the world's best outdoor mat. This mat is 1" thick with durable bristles that clean, remove, and trap up to 5 lbs. of dirt. The thousands of strong, durable bristles work together to clean away dirt and grime, trapping them under the mat and off your interior floor. Bristles adjust with each step to scrape dirt, snow, sand, and debris from the soles of shoes, and the drop-through spacing hides collected dirt from view. This sturdy weather- and slip-resistant mat features a 2" sloping aluminum safety ramp and a 1" threshold that butts to your door.