This supple, quick-to-wick tee is Patagonia's stretchiest baselayer, made to help keep you cool, dry and moving freely during active pursuits. The fabric blend of 84% polyester / 16% spandex has 'Gladiodor' odour control and 50+ UPF sun protection. Resting lightly on the skin, it allows a cooling airflow and wicks perspiration. The neckline has a scooped shape. Offset seams feel smooth under pack straps, and reflective logos on the chest and center-back aid visibility.