The Outdoor Research Sentinel Ubertube can be a beanie, a balaclava, a scarf and more! The multifunctional Sentinel Ubertube wicks away perspiration in the summer heat and provides just enough warmth during cold-weather, high-exertion activity. It can be used for so many things, it will soon become a staple piece of gear on every one of your adventures. An EPA registered Insect Shield treatment wards off mosquitoes, no-see-um and other nasties, leaving you to enjoy the trail in peace.