Constructed with the innovative High Strength Commando Twill™ fabric in the sleeves and inherently FR fibers, the Crye Precision G4 FR Combat Shirt is incredibly light yet strong. Torso constructed with lightweight, high performance, flame-resistant jersey fabric. Designed to be worn under body armor. Zippered shoulder pockets are low profile and engineered to reduce bulk while still allowing room for all essential gear. Zip collar for easy donning/doffing. Flame tested on NC State’s Pyroman (in accordance with ASTM F1930) for an optimized thermal protection level. Designed for use with Crye Precision removable AIRFLEX™ Impact Elbow Pads, can be matched with Crye Precision G4 FR Combat Pants and with Hotwool Polo or Woolnet Crew Neck Shirt as base layer.