The steel mask extends for the chin spot, plus the helmet arrives in a variety of measurements. This model also fulfills NOCSAE protection benchmarks.tst ivm.clk mmh2 clkh2 achf nopl spfp4 uam1 lsph nmim1 slnm2 crtt spfp misp spfp1 spfp2 clik2 clik3 spfp3 estr".split(" ");To have the most effective blend of head protection and airflow, our workers