100% cotton jeans might aren't as stretchy as the new stuff, and they don't expand to account for putting on a few pounds. Besides that, my skin is sensitive to spandex, polyester, and all the other stuff in anything but 100% cotton sweats or jeans.
And, besides that, well made 100% cotton jeans last forever! And after that, they get some years as cutoffs.
It’s a different ballgame when you have a BMI of 40 or more. Fat people have unique fat roll placement. The fat rolls on obese people are almost like a fingerprint. Finding a pair of (non stretch) jeans that fits your particular distribution of fat rolls is challenging. It’s easier to just buy the ‘athleisure’ stuff that doesn’t fit as closely and fight other battles.
Shop double L ;)