The North Face Mens Signal 2.5L Dryvent JacketEngineered with seam sealed 2. 5L DryVent technology, this reliable jacket completely blocks out the most extreme weather conditions on challenging mountaineering expeditions. But even though it delivers reliable waterproofness, its breathable enough to help prevent you from getting too hot and sweaty. The alpine hand pockets and pit zips ensure its outdoor ready without losing its pared back looks, meaning you can wear it away from the mountains,