South Korea 3' x 5' Ft 210D Nylon Premium Outdoor Embroidered South Korean Flag

Q: Where is this flag made?

There are no tags on the flag telling where it is made. Sorry.

Q: What's the best way to get wrinkles out of the flag before wall mounting it?

Honestly, I don’t know, but one possible solution may be to take it to a local dry cleaners, and explain in detail what you want done. You said “wall mounting”; in a frame? That would be a different solution. Flags in frames are stretched to relieve the wrinkles. Good luck on your project. When you resolve the problem, post the answer to help someone else.