I bought a pair of the "signature" work dungarees and I was amazed at how much thicker they are than the "regular" work dungarees (Both Carhartt). It says that these are 15oz as opposed to 11.75oz for the standard ones but it seems much more dramatic than that? There is only about a $2.50 price difference between them so if you are looking to use these on a daily basis for work I would suggest that you go ahead and order the "signature" model... As a side note order 1 size larger waist than you typically wear as they seem to run small.