Although called a "jacket" it's really a coat in my eyes. I'm including pictures of the 3 oilskin coats I have from Outback. The Gidley, the Overlander, and the Pathfinder. They wear solidly and the oilskin fabric cuts the wind well. For that reason, they are a warm coat, easily down to 20's. Below that, I wear an additional heavy under layer. I wear the Pathfinder out on the town. A draw string at the waist gives a fitted look and makes a great saddle length coat as with the Gidley. My Overlander is my every day work coat for 5 winters now. During the week in construction and logging and wood cutting on the weekends. I'm mentioning this because I believe these coats at basically a medium duty coat. I've been putting mine to hard heavy use and it holds up great. There could be some high wear locations where some seams could be double stitched or back stitched. In the one picture I'm wearing a cantle pack from another brand as a fanny pack.
I've found Outback oilskin products to be the best in quality I could find. The customer service is good in regards to product info. Once I receive a coat, I don't look back, I just wear it.
On sizing, I'm 6'0 tall and 205 lbs and XL's fit me perfect with room for an under layer if needed.