Lightweight non-stretch nylon twill material. The high quality you expect from Champion products. Probably most useful as a wind or light rain shell since it's unlined. The embroidered (versus a printed) logo makes the item.
I consider this a standard fit and recommend ordering your regular jacket size since it's generously cut. If you plan to layer it over anything warm, you may want to order a size up if for no other reason than to make it easier to pull over your chest and shoulders.
As a repeat customer, I can't say enough about SISTG's customer care. Responsive, knowledgeable and professional - a winning business model.