This shirt isn't just stylish, it's built with tech that will keep you going for a multitude of outdoor situations. It is vented at its side seams to provide cooling, has underarm perforated fabric for ventilation and a back chimney perforated fabric for ventilation. With its 4-way flex, it will assist in moving in all the ways you need. Tagless neck for comfort, relaxed fit, Advanced Cooling Technology and two front pockets. Material: Polyester, Spandex.