The Black Diamond Men’s Treeline Rain Shell is a rain jacket for the trail. Hike whether there is rain or shine in the forecast, with this trusty shell in your pack, you’re ready for it all. The BD.dry 2.5L fabric is waterproof, breathable and even cuts the wind. The hood is helmet compatible if you’re climbing and adjusts quick to fit your head. The pockets feature a mesh lining for more air flow and comfort and when it’s not being worn, it packs into its own pocket for small, safe keeping.