The 3mm thick, optical grade polycarbonate lenses shield eyes from unexpected fragments and offer 100 percent protection from uv-a, uv-b and uv-c rays;certified to ansi z87.1 and military requirements(mil-v-43511c clause 3.5.10 and mil-prf-31013 clause 3.5.1.1);specially designed threee tiered anti-fog system ensures clear, fog-free vision;all-round venting maximizes airflow while filtration media prevents small particle entry;weight:4 ounces;color:black