The MultiCamﾙ FR Combat shirt is sewn to the official USMC Fire Resistant Organizational Gear (FROG) specifications. It is designed by Crye Precision and made of patented Defender Mﾙ flame-resistant fabric with an enhanced X-Staticﾙ DRIFIREﾮ knit torso which reduces core body heat and prevents bacteria growth, and provides odor control. All thread, zippers and loop components are flame resistant.