Perfect for every outdoor doorway, the Clean Machine Doormat is exclusively made with Genuine AstroTurf scraper blades to trap dirt, snow, sand, grass, and mud before you track it into your home. This scientific cleaning breakthrough mimics the natural cleaning power of grass. The patented manufacturing process creates a grid pattern of thousands of small plastic blades that provide an unparalleled cleaning surface that scrapes shoes cleaner than any other doormat. Made from flexible, yet durable polyethylene. Designed to withstand all kinds of weather so you can keep it out all year long. This 18" x 30" mat holds/hides about a pound of dirt per week.• Grabs, holds, and hides up to a pound of dirt per week• Genuine AstroTurf scraper blades stop dirt at your door• Great for every outdoor entryway• Resists mold and mildew• Easy to clean â shake out the dirt and rinse with a water hose Grid pattern scrapes shoes clean Resists mold, mildew, & fading 18"" x 30"" mat holds & hides about a pound of dirt per week | Grassworx Clean Machine Flair Doormat, 18" x 30", Sandbar in Tan