The Womens Summit Hybrid Vest is body mapped for perfect insulation. Filled with high-loft QuadFusion™ ? for performance. Made to manage the challenges of mountaineering. This vest - designed with stretchy fleece side panels for a snug fit and great mobility - provides superb wind protection as well as great moisture management, thanks to its waffle-structured high loft lining. Elasticated so that it stays in place, no matter how fast you're going. Treated with a fluorocarbon-free DWR for good protection against water and dirt.