The 7v Women's Insulated Jacket is designed specifically for women not only for fit but also for warmth without the bulk. It is ultra-lightweight but with stellar heatretention capabilities. Constructed with an extra soft, 20 denier mini rip-stop nylon liningand quilted shell filled with 80 grams of lightweight, compressible polyester fiber insulation. The sleeves are lined with a soft tricot fleece for additional warmth and feature lycra thumb through cuffs to help keep a firm fit and to help seal out the cold. Not only will the Cracow Heated Jacket heat up on command, it will hold the heat better than any jacket on the market. It features a 3 zone heat system concentrated in the chest andback that is powered by the included 7v lithium battery. No matter if you are climbing the nearestmountain or going down the block to get groceries, this jacket's form, fit and function issecond to none.