I wanted something super light to wear while hiking, but I needed full zip for accessibility issues. Everything I found looked obnoxious or wasn't full zip. The jacket is super light. As light as if not lighter than some athletic shirts I own. The picture makes it look black but it's more along the lines of a dark gray due to the Heather. I'm 5'11" 175lbs. I'm a climber, so my chest, shoulders and arms are a bit more muscular than most. Also I have relatively long arms. Most sleeves are too short. This on the other hand fits perfect. It's not too baggy like a sweatshirt. But it's not too tight [especially in the sleeves] as is the style of a lot of similar shirts. I'll be using this for everything outdoors; hiking, climbing, kayaking, yard work, heck probably even when we go out shooting.