Our most breathable Endurance soft shell, the Helium Windshirt is a consummate companion for forward-motion activities in windy or chilly conditions, particularly during the magic hours of dawn and dusk. Exceptionally comfortable on the uphill, and wind-resistant when a northeaster starts to blow, the Helium also acts as a microclimate mid layer, gliding easily under other layers. Supercompressible, it stuffs into its own pocket. Imported.