These pants are the best workwear I can find, period.  I work as a machinist, welder, and fabricator and nothing else seems to hold up very well.  The double front (second layer of fabric covering the entire front of the pants from waistband to mid-calf) significantly increases the durability.  I also like the leg side pockets, which I use to hold pens, pencils, scribers, and a 6' folding rule.  They work alot better than a shirt pocket because things don't fall out when I bend over.  The sizing is generous where it counts, particularly in the lower leg (fits great over tall boots).  I will continue to buy Carhartt clothing exclusively.