ITK® style 214 is square braided from reinforced Poly Acrylic Nitrile (P.A.N.) fibres in combination of pure graphite fibres, each strand of yarn is thoroughly impregnated and is sealed off with a special grade of fine graphite flakes. To enhance the packing performance and properties, this composite yarn is given a treatment of final coating of graphite impregnation prior to its been squared.