Patagonia Zephur softshell jacket.
From the Patagonia hang tag (which I have): “Highly breathable, wind and water-repellant shell, with thin tricot fleece liner, buffers against external moisture and is extremely fast wicking.” This jacket has a nylon microfiber shell that is EncapSil treated. As I understand it, EncapSil was Patagonia’s name for an EPIC -like product that encapsulated the fibers with silicone. My Zephur is Black and Medium size. The size is the crux of the matter - it’s just too tight for me any more. Still works great and I would keep it if it were larger. The jacket has a full length zip plus a left side chest pocket and a cinch cord around the bottom. It’s in very good condition and has never been washed in anything but Sport Wash. This jacket was also made in the USA and mine weighs 262.5 grams (9.26 ozs.) I’m asking $55 plus shipping.
Since this is a no longer produced item for those interested the Zephur looks very similar to the Patagonia Alpine Wind Jacket except that the Zephur only has the one chest pocket and is Encapsil treated.
Here's a pic of the Alpine Wind Jacket: