I ordered a large at first because the info says they run small so order a size larger. Wrong! The second one, a medium, fit this medium sized guy; me. The zipper is backwards. The pull should be on the right; it’s not, it’s on the left. That’s awkward. The zipper also feels cheap, and gets jammed up at the top when zipper all the way up. Otherwise it looks great, and should work just fine for a driver’s work vest. The material seems funky, and I’m hoping it doesn’t come apart at the seams. So far I’d recommend it.