The KUHL AIRSPEED LS Shirt is a game changer. Hot sun, high humidity, and stifling air are no match for KUHL's collection of AIRSPEED shirts with AirVolution fabric. AirVolution is a woven, technical nylon/poly blend that blocks the sun's harmful UV rays, wicks moisture and dries quickly. It feels like cotton against the skin but boasts all the performance of polyester. Button-down collar, button front, Adjustable cuff 2 button-down chest pockets A zippered security pocket is hidden inside the shirt at the chest a built-in custom sunglass cleaner is sewn inside the bottom left placket.