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