Flock Series Gravel Door Mat is used to provide a safe surface for cleaning footwear and preventing dirt from entering a home. However, it's also crucial to make sure that a mat doesn't get in the way of a door's function, which is why location is so critical. Our provided Flock Series Gravel Door Mat is safe to use. The dirt and moisture are trapped in the doormat until it is washed or replaced. Many home mats may now be washed in the washing machine, making housekeeping even easier.