Strategically placed mesh vents add extra comfort to this hard-working shirt. It has the same good looks and great fit as our Western performance shirts, plus flame-resistance ideal for hazardous work environments. FR Solid Vent Work Shirt Product Features : Moisture Movement Technology™ helps wick moisture away from the skin to keep you dry and comfortableGreater Arm Mobility™ helps extend arm and shoulder range-of-motion so you can move freelyVentTEK™ mesh panels provide ventilation in key areas to help keep you cool and comfortable, Honeycomb mesh side panelsBack vent, Zippered hand and chest pockets provide secure storage for small essentials Men's Flame-Resistant Solid Vent Work Shirt in Navy, Size: Small by Ariat