SGE 4003 Gas Mask Full Facepiece RespiratorHigh-EndPremium Design - components made in Italy & assembled in USA The SGE 4003 gas mask has 3 filter ports (left, right and center) and is offered with an optional hood and canteen drinking system. Soft inner orinasal cup quick release harness with six adjustable straps. Controlled air flow prevents fogging of the visor. Unlike other mask designs, the full facial coverage offered by the Tecno-Pro mask provides wearers with full visability additional face protection from flying debris. The extremely durable polycarbonate visor has been tested to resist a one inch steel ball, that was propelled at 335 MPH without cracking or damaging the face shield. The mask was also tested for heat resistance and will not catch fire or melt at 800 Degrees C (1472 F) for 5 Sec. or 200 degrees C (372 F) for a duration of 6 Min. The SGE-4003 models have a special resin coating applied to the polycarbonate visor which provides additional scratch & chemical resistance. The competitive price, simplicity and the ease of maintenance of Tecnopro full face mask systems make them an easy choice.