They are not as thick as Carhartt double knee pants but very good quality for the price, which was about 1//3 of Carhartt's price. I'll see how they wear and compare them later on. UPDATE: as of Nov. 2013...haven't worn them a ton, they were a bit tight at first, now I've lost weight and they are too big but I wear a belt. They are really really soft, and tough. The brushed material is softer than Carhartts which some might not like but I like both and these are way cheaper in price. Great color too.