Tecgen Select FR Grey 5.5 oz Dress Uniform Shirt Flame Resistant Lightweight, Moisture Wicking, Breathable Dual Certified NFPA 70E - HRC 2 (Eletric Arc) and NFPA 2112 (Flash Fire) Arc rating ATPV 8.9 calories/cm Inherently Flame Resistant Extra room in the body for ease of movement.