Good job; that looks good mate. Did you use a commercial pattern? If so, which? if not, did you copy an existing garment? It looks like the left and right shoulder yolk and sleeve are all one piece, stitched along the underarm. Is this right? There is no rear view, so is the back one piece of material? I made something similar in the 90s, based on the now defunct Survival Aids' own ventile windshirt and it has lasted for years of travelling, being rugged, practical and effective,including a brief foray to the top of Kilimanjaro, which is why it looks pretty frayed now and needs replacing. Enjoy yours too!