[BI4L Request] Jeans, Pants/Trousers, Shorts that don't wear through quickly

Hi, I find that a lot of the jeans, trousers (pants), and shorts that I wear quickly wear out between the legs.

Can anyone recommend specific clothing manufacturers, fabrics or cuts that will last longer? I doubt a "for life" pair exists but if you think otherwise let me know!

Also if there are any tips for extending the longevity of such clothing let me know...

Thanks in advance for any advice or recommendations you can give!