Rubber Door Mat for Indoor Outdoor, Floor Mat for Entry, Patio and Bathroom, Pocket Design for Dirt Collecting, Shoes Scraper, Waterproof & Easy to Clean (35"x23", Grey) Double-layer Thickened Pocket Design: double-thickened pocket design floor mat breaks the function of traditional floor mats. Sellemer floor mat pockets can help to collect dust and sand from the shoes. Through the honeycomb-designed holes onto the bottom layer.