I bought a couple pairs of these at BJs wholesale.  The product itself fit pretty well and the colors were nice.  The first pair lasted me about a year before the crotch area tore open.  They were not excessively washed, so was a little bummed that they wore out so fast.  The second pair tore again at the crotch after a week of usage, was stepping onto a 2 foot wall and the stretching motion must have exposed a weakness.  The third pair tore yet again at the crotch after 4 months of light use while stepping over a 2 and a half foot gate.  The first pair that lasted a year did both of these motions numerous times without a single issue.  Best guess is that these are hit or miss for durability, but even if you get a hit the longevity just isn't there.  I switched to these after lee dungerees went to stretch material, will need to move on to something else.