This Beeswift fire retardant boilersuit is 300 gram, 100% cotton drill fabric with flame retardant treatment. The boilersuit has a concealed stud fastening at the front up to the neck. 1 left breast pocket with flap, 2 front hip pockets. Plain back and hips. An embroidered FR logo to upper left sleeve. EN ISO 11611:2007 Class 1 A1 - Protective clothing for use in welding EN ISO 11612:2008 A1. B1. C1 - Protection against heat and flame.