Tightly Woven Fabric: The Tarps are constructed with tightly woven polyethylene fibers which provide superior durability and protection Waterproof: Tarps can be used to shelter boats, cars, campers or motor-vehicles from the elements (i. e. wind, rain or sunlight), as an emergency roof patch material for homeowners, and as a temporary pickup truck bed cover Lightweight but Durable: All BlueTarps are enforced with border piping to insure stronger ends to avoid tears during stressful applications. Each tarp is 6 mil. thick, making them extremely lightweight and portable Built-in Grommets: EveryTarp includes built-in aluminum grommets every 36" to allow secure tie-downs Ultimate Protection: Choose the right tarp for the job - Grizzly Tarps have available sizes that range from 8x10 feet and get as large as 50x100feet