Dust and dirt stick to the stopper mat, not your feet. A multi-layer dust & dirt stopper film mat can capture dust, dirt, and other particles as you enter the space. A single sticky mat can be used for a long time with 30 layers of the adhesive film. It is easy to use. You just simply peel away the film layer and it will be ready to use. The mat must be replaced with a new 30-layer refill mat every 3 to 6 months depending on the use. It can be used in a construction site or any controlled environment area.