Tactical Distributors has put together a pretty good video showing the features of the Arc’teryx LEAF Wraith. It is an Overgarment designed to fit over your kit and provide camouflage. It can be used for winter with the white version or just to provide rudimentary camo to street clothes with the Crocodile version. Conversely, it also works as a great, lightweight, low volume emergency shell. It’s highly breathable ripstop construction features a DWR coating that will help keep your insulating layers dry as long as you keep moving. My experience is that it will keep up with conditions in all but torrential rains.