A hike into Naturalist Basin can start under the warmth of morning sunshine and end in an afternoon deluge. Regardless of the conditions, you’ll stay cool and dry in this versatile, stretchy crew. Worn alone, it provides 50+ UPF sun protection and a cool, drying airflow. Paired with another layer, it wicks moisture and adds warmth when temperatures drop. Made with our stretchiest Capilene® performance baselayer fabric for breathability and ultra-fast dry times. With a tuckable length, self-fabric crewneck, flatlock seams to reduce chafing beneath pack straps, thumb loops for secure hand coverage and offset side seams. Made of 4.6 oz 94% polyester/6% spandex jersey, with Polygiene® permanent odor control.