I love Dickies work pants I have quite literally bought every type over the years and they have never let me down apart from when there days where numbered but hey nothing lasts forever, but these come close.
<a href="http://mammothworkwear.com/dickies-workwear/dickies-work-trousers/dickies-action-trousers-p411.htm" rel="nofollow">http://mammothworkwear.com/dickies-workwear/dickies-work-trousers/dickies-action-trousers-p411.htm</a>

I tried all the other big names and they just aren't the same after Dickies.
