Made of PP, better oil resistance, abrasion resistance, acid and alkali resistance, ageinresistance and pliablility, protect upper chest and throat from sparks and spatter;                                                     adjustable ratchet suspension, curved top extends well over the head for added protection;                                                            flip front lens for easy weld inspection, inspection window size: 2'!á4-1/4';                                            welding plate can be changed according to the electro-optic, it can purchasseparately.