Arc'teryx Trino Beanie N420p Nylon Oxford Imported TRINO BEANIE - Windproof, breathable and weather resistant, and designed for high output activities in cooler weather, the Trino beanie delivers the protection of WINDSTOPPER with air permeable Vistrasari side panels for added ventilation. TRAIL RUNNING - Technical trail running systems with a focus on freedom of movement and moisture management. WINDPROOF MATERIAL - Impervious to wind and offers significant weather resistance with lighter weight protection.