The Zephyr is true to its name, as in, it's as light as a zephyr! I have worn this lightweight layer in temperatures from 55 and raining down to 19 and windy. It provides that additional windblock and rain resistance that you need to convince you to get out the door! I love the details of the snap mid-chest so you can open up the jacket when you start to warm up, but not have to take it off. The seams are high quality as is the fabric. The fabric has stayed pill-free after multiple washings, and does not seem to hold any odor. The elastics at the wrists are loose enough to cinch up if needed, and there is a nice, thin but tough loop so you can hang the jacket up easily when you return home. There is one chest pocket, which is good for a gel or a key. It does not fold up into the pocket, but since it is so light you may not ever need to take it off! I received my Zephyr as a test piece for free so the color was not of my choosing, a caffe latte brown, but the fit is roomy and, again, barely noticeable