300 Gram cotton drill fabric with flame retardant treatment. Brass zip fly. Button waistband fastening. 7 Belt loops with with vertical side seam access pockets. Plain back and hips. FR logo embroidered to left hip. Conform to :-. EN ISO 11612 A1 B1 C1 - Protection against heat and flame. EN ISO 11611 CLASS 1 A1 - Protective clothing for use in welding.