The Carhartt Canvas Shirt Jacket is the sturdiest garment of it's kind made as far as I'm concerned. I can layer this over my T and a Merino wool middle layer and be very comfortable on those crisp days in the 30's.  Carhartt never cheaps out when it comes to clothing for us "big'n tall guys"...sleeve and shirt lengths are always right on.  I love the snap front for easy on-easy off, and the no-flap pockets are great for folks who like handy access to their daily 'utensils', i.e. pens, clip flashlight, mini-tools, etc.  The soft flannel lining is the frosting on the cake for those of us who know.