My husband has been wearing Carhartt's for 25 years!  He has worn this B151 since we moved to a warmer climate and does not want the heavy duck material that they also make.  Yes, it is a shame it is not being produced in the USA any longer.  Amazon is a great place to buy these, and their price seems to be the best.

Because they are all cotton, I would recommend that they be taken out of the dryer right away.  I usually smooth out the legs so they look a little nicer.