The Arctic Cool Instant Cooling Multi-Functional Gaiter not only keeps you cooler, longer thanks to HydroFreeze X Technology, they also can be worn 12 different ways! When you begin to sweat, or the gaiter gets wet, HydroFreeze X Technology automatically activates and wicks moisture away from you, causing a cooling sensation. With UPF 50+, our gaiter can keep you protected from the sun all day long!