Breathable TEK woven fabrication, built-in sun protection and moisture wicking technology makes this stylish button-front shirt a hot-weather winner. It also features an underarm gusset for ease of movement, handy zippered chest pockets and a hidden sunglasses cloth. VentTEK Classic Fit Shirt Product Features : AriatTEK for superior performance in any weatherGreater Arm Mobility for freedom of movementMoisture Movement Technology wicks away moisture from skinSun Protection FabricVentTEK technology enables airflow, Breathable mesh yokeHidden collar buttons, Hidden microfiber lens cloth on shirt tail, Zippered chest pockets Men's VentTEK Classic Fit Shirt in Moonbeam, Size: Medium by Ariat