3.7 oz 100% Polyester MircoFiber. Fast Drying Cooling Fabric. Dyed to match buttons. Square pockets with a tactical hidden pocket and side pen pocket on sleeve. Vertical venting in the back with mesh lining. 360 visibility with front, back, and shoulders 2" segmented silver reflective striping. ANSI 107-2010 Class 3 Level 2 Compliant. ANSI 107-2015 Type R Class 3 Compliant.