Additional extra-large head protection for your 3M Speedglas 9100 FX and Speedglas 9100 FX Air welding helmet (part number 169007). Extra-large head cover helps to protect you from molten metal, sparks and flames while you weld. Additional coverage made from the flame resistant Tecaweld cloth (a blend of 75% cotton and 25% Kevlar fibres). Extra-large version gives you more coverage and protection than standard head cover. Only suitable for use with Speedglas 9100 FX and Speedglas 9100 FX Air welding helmets.