Check out Wirecutter for testing, reviews, and discussion (may require subscription): https://www.nytimes.com/wirecutter/reviews/best-bed-pillows/

I've been using their reviews on lots of items for years and very happy with most of what I've picked up. They usually have budget and upgrade picks and explain the differences.

I've been through tons of pillow options over the years, never quite satisfied. Just picked up the Wirecutter back sleeper recommendation at $90 (Nest Easy Breather) and it is hugely more comfortable than what I had. I was also wary of spending that much but glad I pulled the trigger. Haven't had it long enough to know long-term, but I feel pretty confident with all the info in their review.

I'm an archaeologist in the US southwest, often off-trail in scrub. I had the same issue with Kuhl not lasting. Look for something ripstop, probably cotton-nylon or cotton-polyester blend for durability and comfort. I've been wearing LAPG Urban Ops Tactical pants for years and am happy with them. Not as flattering a fit as some, but cheaper and much more durable than Kuhl: https://lapolicegear.com/lapg-urban-ops-tactical-pants.html.

I love the 1620 Workwear Utility pants that someone else mentioned, have 2 pairs. They're bombproof, but I wear them in the shop not the field - too stiff and heavy for the range of motion I need. Their Tech Stretch line would be better for field use but I haven't tried them yet.