Whether you pulled a late-season elk hunt or are down to the closing bell in the treestand, First Lite's Furnace Quarter Zip is the perfect tool to help you punch that tag in cold weather. Using our Merino-X 350g EXP weight fabric, the Furnace Quarter Zip provides lofted insulation and protection from the coldest temperatures. Featuring a high collar and quarter zip for protection from the elements, and flatlock seams throughout its newly articulated fit, the Furnace Quarter Zip is the ideal layering piece over our other lightweight, next-to-skin styles. Our Furnace EXP 350 Merino-X fabric incorporates a brushed (or fleeced) backside to our high loft, interlock knits to provide super-charged insulation without added weight. Adding this to the silent, odor-free benefits of merino wool, the Furnace merino is the hands-down choice for cold weather hunts. Features True to size: Purchase your normal size to wear over or under other layers 20.5 micron, superfine, merino wool 95% merino / 5% spandex Expedition weight, fleeced Merino fabric for extreme cold Quarter zip neck for strategic ventilation Modified raglan sleeve moves seams out from under backpack shoulder straps Ergonomic cuff with thumb loops Flatlock seams Machine wash, line dry