99% Cotton, 1% Carbon Fibre. Design: Contrast Detail. 350gsm. Fabric Technology: Bizflame, Flame Resistant, Protection Against Contact Heat, Protection Against Convective Heat, Protection Against Radiant Heat. No. of Pockets: 10. Pockets: Back, Ruler Pocket, Knee Pad Pockets. Radio Loop, Sew-On, Triple Stitched Seam, Wash Tape. Conforms to Safety Standard: ASTM F1959/F1959M-12 ATPV 13.6 CAL/CM2 (HAF=82%), CE Certified, CE-CAT III, Class 2, EN 1149-5, EN ISO 11611 Class 2 A1+A2, EN ISO 11612 A1+A2, B1, C1, E2, F1, IEC 61482-2 IEC 61482-1-1 Elim 8.6 CAL/CM², IEC 61482-2 IEC 61482-1-2 APC 1, UKCA. Welding Protection. Cuff: Adjustable, Stud. Fastening: Two Way Zip. Sun Rating: UPF 40+. Ref: UTPW631