This 30' x 50' Polyester American Flag is designed for severe service conditions such as ships at sea, constant high wind regions, and atop high towers and buildings where access is difficult. These flags will outlast nylon, but are not recommended for most applications, since they are of much heavier material and do not fly well unless there is a significant wind. Each flag is made from double-weave polyester fabric, which is very heavy duty, and sewn with double lock stitch seams and has individully appliqued stars. For details, please see our Flag Construction Facts Page. Please Note: Overweight Item can not ship to APO via US Mail. Free shipping to 48 States only