Spun Polyester is the most durable US flag on the market. The open weave reduces fabric stress and resists high winds. These flag are the best choice if you fly the flag 24/7 and your wind speed is higher. as these flags are made from heavier fabric they require a higher wind speed to "fly" than nylon flags. Also they require more effort to put up and take down.
The 2-Ply polyester looks like a coarse cotton. All these flags have sewn stripes and appliqued stars. They are designed for outdoor use and will resist fading and fraying.
These top quality 2-ply polyester flags are all 100% US made by Valley Forge using traditional 600 D spun polyester fabric. They have sewn stripes and appliqued stars, roped canvas headings with thimble ends.
Also consider
nylon American flags which are lighter to handle and fly in lower wind speeds. They are also significantly less money to buy. But a nylon flag will fray before a spun polyester flag.
This size flag is suitable for flag poles from 120ft. and taller.
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These flags are 100% American made.