Iso-Chill fabric helps dissipate body heat, so it's cool to the touch. Four-way stretch material moves better in every direction. The material wicks away sweat and dries very quickly. UPF 50+ protects the skin from the sun's harmful rays. It has a strategic laser perforation in the armpits for better ventilation. 4-button closure with a modern ribbed collar and designer mesh detail; side hem with slits