The Montane Men's Featherlite Pant provides lightweight protection when Mother Nature tries to rain on your parade. This 4oz yes, you read right, windproof pant packs down to the size of an apple in the included stuff sac when skies are clear. Montane's Enhanced Breathing Panel E. B. P in the lumbar region provides increased breathability in a usually high moisture area. Articulated knees and ankle zips give you more freedom of movement when you hike, bike, and run. The Featherlite's reflective elements help keep you visible when it gets dark.