Conforms to EN ISO 11612 A1 + A2, B1, C1, E1 and F1. EN ISO 11611 class 1, A1 + A2. NFPA® 70E. ASTM F1959/F1959M-12 APTV=11.2 CAL/CM2. Flame resistant finish. UPF 50+. Part elasticated waistband with belt loops. Zip fly with hook and bar over. Two side pockets. Ruler pocket. Twin needle seams. Co-ordinates with PW453.