Large, 9 by 12 foot all over black and white checkered lightweight reversable outdoor ground mat. Weighs about 10 pounds and will fold to a compact size of around 13" wide by 5" thick by 36" tall - small enough to fit anywhere (including the optional carrying bag). Made from 100% Polypropylene (plastic) with protective UV stabilizers (reduces effects from the sun), in a woven open waffle design. It is very strong and allows air and water to pass through - keeping you dry, yet not so open you'll loose dropped parts. Strong enough to let you to walk and work with all your equipment without fear of damage, although it'll probably melt with something really hot. It won't absorb water, mud or dirt which will for the most part just sift through - making cleaning very easy - just sweep it off or hose it down. Won't mold, mildew or rot. Has a Nylon loop at each corner so you can stake it down.