Our Poly-Max U.S. Flags are crafted using 2-ply 100% polyester bunting. The open weave construction reduces wind resistance, increasing flag life. Poly-Max material is extremely durable and ideal for commercial applications and high wind areas. Finished with a white poly-cotton header. Available in Standard or with Vertical Stitching & Reinforced Corners, which adds 4 vertical rows of zigzag stitching on the fly end and zigzag stitching on fly end corners for extra durability. Made in the USA. Note: The 50' x 80' size is intended for display purposes only, not for flagpole use.