I have the same problem with trousers as OP due to my chubzy legs.
From what I have noticed the durability of the fabric depends more on the type weave than the weight or S-number.
Birdseye for example seems to go quite quickly which is a shame as I like it.
Could someone with more knowledge of fabrics tell me (and others with this problem) which type of fabrics to avoid? Which suiting would be most suitable for those with our problem? I had a mohair sample in my...