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® is designed for optimal comfort in any weather, with built-in performance features that adapt to changing conditionsGreater Arm Mobility™ helps extend arm and shoulder range-of-motion so you can move freelyMoisture Movement Technology™ helps wick moisture away from the skin to keep you dry and comfortableVentTEK™ mesh panels provide ventilation in key areas to help keep you cool and comfortableSun Protection Fabric™ helps block harmful UV rays, keeping you covered and comfortable during long days outdoors, Microfiber lens cloth is hidden in the hem for on-the-go cleaning, Breathable mesh yoke enhances airflow to help keep you cool and comfortableHidden collar buttons, Zippered chest pockets provide secure storage for small essentials Men's VentTEK Classic Fit Shirt in Black, Size: Large_Tall by Ariat