^ This.
I have worn 5.11 Tactical Taclite Pro for a few years and they are
awesome. They breathe very well, don't wrinkle up, look good, fit good, hold their color well.
They are made of a polyester/cotton mix that is rip resistant. It really does not continue a rip once one forms either from a knife cut or abrasion. The knees are doubled material, the seams are double stitched etc.
And my favorite part about them? You carry a knife daily...right? Well, you should, but anyway, there is 4-6x the material on that seam at the corner of the front AND rear pockets where your knife sits. No more ripped out corners!
They are a little pricey, so are good tools right, but they are
awesome pants.
Even better are the Stryke pants, but they run $70-75. Those have a little spandex woven into the fabric that makes them move and fit a little better.
5.11 TacLite
5.11 Stryke
And while you are placing an order for 5 pairs, get your self a new belt.
Operator Belt
Best utility belt I have ever worn. Blackhawk also makes a nice operator belt but I haven't personally worn one, but some of the confined space rescue guys from the Mosaic plants have them and swear by them.
We all like to buy quality tools, and I think work pants are an extension of that mindset. Plus 5.11 does some good stuff for wounded vets, fallen officers, etc.
And I forgot to add, they have 7 belt loops, and not 5. I HATE pants with only 5 loops as they do not seem to hold the belt at the waistband all the way around.
I guess I am overly picky but whatever.