nostr:npub1ul8tua30lc5rs6ytqus250kg244vevnaumsdsqfl42cz3n86hhzs04kl35 WOW! After a google search, I found nothing like this! Thank you!
nostr:npub1rwast7q4z8skpycsz8epd3jyvgjxhe0uf7ljf93sxvg9qtk9x4vqhyger6
Hmm. You might want to get a flag suitable for the US military - it would be made to be durable under a wide variety of conditions.
Here is one company
https://annin.com/products/military-flags/
with a link to where to buy one.
For the material - it looks like they use 70% polyester and 30% cotton according to this page
https://view.publitas.com/p222-2684/annin-2023-commercial-catalog/page/11
You could also ask the flag company what they recommend as well (if independent).
Discussion
nostr:npub1rwast7q4z8skpycsz8epd3jyvgjxhe0uf7ljf93sxvg9qtk9x4vqhyger6
I also took a look at the flag my mom bought years ago. It is something like this one
https://www.valleyforgeflag.com/prod-466-1-24-344/perma-nyl-3-x5-nylon-u-s-flag.htm
All nylon. It has lasted for years now (maybe decades - hard to say).