LIGHTWEIGHT Because the H2P System combines warmth & insulation in a 100% waterproof / windproof garment, you now only have one jacket to worry about – instead of 2 or 3. Use one jacket when it’s cold and windy. If it happens to rain, don’t worry – it’s also 100% waterproof. We figure you’ve got enough to carry already, without worrying about packing extra coats. With an average jacket weight of 2.2 lbs., you barely notice the weight. And that’s exactly how we want it.