Heat attenuation factor (HFA) of 73%. Arc-Rating ATPV 9.5 cal/cm2 to protect against dangerous electric arc flashes. Excellent heat and flame resistance to protect the arm from heat and burn injuries. Thumb hole allows protection all the way to the knuckle without sacrificing dexterity. Kevlar® knit wrist offers cut and heat resistance and prevent debris from entering the sleeve. Superior comfort and fit, can be worn over clothing or directly on the arm.