These Sunbrella Tarps are manufactured to the same rugged standards of our shade and heavy duty vinyl tarps. Sunbrella is a breathable fabric that is the standard in the boating industry. Sunbrella is not waterproof but has excellent water repellency. Northwest Tarp Canvas is proud to offer these Sunbrella tarps manufactured with the same Sunbrella boat canvas fabric found on most boat canvas tops. The webbing is sewn on around the edges for added strength and the #4 Brass Rolled Rim Spur Grommets are placed on the corners and every 16" inches. Sunbrella tarps under 5 feet in width will made from one single length of fabric. All larger tarps will be sewn in two or more pieces. The finished size on our tarps is the stated size. We don't sell "cut size" tarps. The tarp you receive may even be a 1/2" or so larger than the stated size. We don't make your tarp until you order it so if you need modifications such as changes to grommet placement of other configuration please let us know when you order. Sunbrella Tarp - Genuine Sunbrella Acrylic Pacific Blue #6001 Heavy Duty Polypropylene Webbing Sewn On for Reinforced Edges Brass #4 9/16" Spur Grommets Placed on Corners Every 16" Inches 9 Year Warranty on Sunbrella Fabric Marine Grade Sunbrella Boat Top Awning Fabric We Ship Internationally! Northwest Tarp Canvas