This 20' x 40' Nylon Ground Cover (Drop Cloth or Ground Cloth) is used to keep the tent tops clean and reduce pin holes. These lightweight, water-resistant ground cloths greatly reduce the chance of your tent tops getting mud or grass stains or being ripped by rocks and branches. We recommend using ground covers on every tent installation and tear down to ensure the integrity and longevity of your tent tops. This Nylon Ground Cover is hemmed around the perimeter and includes grommets to allow you to stake or tie it down. Multiple ground covers can be overlapped on top of each other for installations of larger tents. Ground covers are an inexpensive and easy way to protect your tent investment.