Show off your rugged oil and gas cred with Walls fire resistant Oilfield Camo work shirt. It'll keep you buttoned up and safe. Made of tough cotton twill, this shirt is 2112 UL certified and HRC Level 2 rated, so it's ready for whatever your job throws at you. You work hard and need protection from the possibility of flames on your job site. Walls got you covered. Material: Cotton, Twill.