Portwest Bizflame Rain Multi-Protection Trouser is manufactured in 98% Polyester & 2% Anti-Static Carbon fibre fabric. The trousers come with a 100% Breathable PU Coating that has a fabric weight of 250g. Combined with a lining that is also flame Resistant Cotton weighing 170g. Additional features include a zip in the outer leg which is concealed behind a flap. There are also taped seams for protection against the rain