I had a pair of carpenter jeans with the knees worn out. (Okay, let's face it, I've got about 1000 pairs like that, I have 4 boys!) I also had a denim skirt in size 2XL that I picked up from a thrift store because of the darling embroidery on it.
You can be sure I put that old worn out denim to good NEW use! Click on through to Skirt Fixation to see the other bag I made using this denim including the clever placement of one of the carpenter pockets.