Steel chain in edge hem all around keeps wind from getting under, so these tarps stay down even in high winds. Field proven to 65 mph. Industrial 14 oz vinyl-polyester fabric with UV and mildew inhibitors. 2 styles: Standard Style is octagonally shaped and designed for maximum rain coverage, its 8 points extending out into grass. Major League Style is rounded to fit inside dirt circle for extended use in sun and for optimum dirt moisture management. Use separate INSTALLER Device for easy storage, installation, and take-up. Standard color is Forest Green. Other colors available for an additional cost of 20% are Black, Maroon, Navy, Red, Royal Orange, Tan, White and Yellow. Please call to place custom color orders.