This vest by Arc'teryx, a Canadian company that makes some of the world's highest quality and best-looking outdoor clothing, is uncommonly lightweight, warm and perfect for layering. Wind and rain resistant, it's filled with Coreloft compact insulation that retains heat even when wet. Stretchy side panels allow ventilation and make it very comfortable to wear. Slides over a base layer and/or under a shell with minimal bulk (weighs only 7.1 oz.) but offers a great deal of warmth for its weight. Has zipper front, high fleece-lined collar, adjustable hem and two outside zip pockets. Packs down to practically nothing so it's perfect for travel. A women's Size XL, shoulder seams are 17.5" apart, chest is 21" across, armholes are 9" and total length is 27.5". Machine washable. Worn only once and in pristine condition!