These pants have some excellent characteristics. The stretch and comfort and great. They dry extremely fast. They breath very well. The knee reinforcement is well placed. And they are very light.
So for high activity jobs when you need breathability and comfort, pockets and mobility... these are perfect.
I'm not sure the primary fabric is very snag resistant, though. So if you're really going to beat the heck out of your work pants you might wanna go with 1620's NYCO line and not the tech stretch.