It’s called Indian Style.
I have a couple pairs of Wrangler ATGs that I wear pretty regularly. They’re the lightweight quick-dry type, but have a pretty casual look. Not overly outdoorsy like my LL Bean ones. They have a million different styles and colors online, but I just snag a pair at target once in a while. The two pairs I have are like 2-3 years old each and have held up to a lot of wear and tear.
Just read these posts and they freaked the hell out of me!!!