The ventilated traps that are located along the back of the Big Bill Men's Flashtrap Ventilated Shirt are specially designed in a manner that does not expose your skin, keeping you protected from arc flash or flash fire exposure. No debris can enter the men's ventilated shirt. The fashion in which the ventilated traps are constructed includes a double layer of fabric, folded to create the ventilated trap, increasing the protection, making a safer long sleeve shirt. The FR Mesh located between the folded double layer of fabric allows cool air to circulate into your shirt, pushing out hot air, creating a ventilation system.