After extensive testing, the new Zeta SL is one of the most stormworthy models we tested. It provides top-tier weather protection and a long-lasting DWR that holds up longer than any other model in our review. In our direct side-by-side comparisons, it excels in our shower and garden hose tests, keeping us comfortable and dry. During real-world testing, including two dozen days of backpacking, climbing, and ski touring over a very damp Fall in the Pacific Northwest, the Zeta SL exceeded our expectations and is one of the most weather-resistant products we tested.