This layer is fully wind and waterproof, so it'll stand up not only to the occasional ridgeline gust but also to more sustained soakings. Simultaneously, the "Dynashell 3-layer material" uses Active Airflow Ventilation to remain breathable, so you won't get drenched from the inside by generating sweat. Lightweight and packable within its own hood, a full zip with taped seams extends up the back of the jacket, expanding to fit right over a running pack. The ZipOver system is a godsend for those who'd rather keep their pack contents dry under the protection of a shell and/or those looking to save a few precious seconds when the rain begins to fall. If you've been relying on full GoreTex shells or hyper-accurate weather forecasts to cope with rainy runs, the Ultra 3L could be a real breakthrough.
