Description of Outdoor Research Megaplume Jacket The ultimate Banff belay jacket, the M’s Megaplume Jacket™ is a toasty warm treat when temperatures take a dive. The 650+ fill down is extremely warm but compresses for stowage in your pack for when winter sun warms you up. The ultralight, waterproof Pertex® Endurance shell keeps you dry when you are showered with spindrift and an oversized hood fits effortlessly over a helmet without pulling or restricting visibility. Features: 650+ fill down insulation Ultralight, waterproof/breathable Pertex® Endurance shell; 30D ripstop polyester lining Zip-off, dual-pull adjustable hood fits over helmet Brushed tricot-lined collar Double-separating front zipper with internal and external stormflaps Zippered napoleon pocket Two zippered handwarmer pockets Zippered internal pocket with media port Two internal mesh water bottle pockets Elastic cuffs with hook/loop tabs Dual drawcord hem adjustments Stuff sack included Avg. weight: 32.9 oz./931 g (size L)