Fit and Design Light, highly ventilating short-sleeved shirt in recycled polyester stretch Technical fabric that gives excellent airflow Great for hiking in hot, sunny climates as it wicks away moisture and is cool and comfortable next to skin Two spacious chest pockets with buttoned flaps and extra zippered pockets with mesh lining underneath The chest pocket zippers can be opened for extra ventilation Press buttons at the front Packs into its chest pocket 84% Polyester, 16% Elastane