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The deflection test could yield sufficient impact to state they are rated for airsoft. Given that BBs tend to break or absorb some impact upon hitting the glasses, the impact force is a bit more spread out, so it's not going to penetrate as badly as a steel ball.
There are differences in impact physics between low speed and high speed impacts, but I'm not TOO worried about that since we're still dealing with a semi-soft projectile.
Using Z87.1+ glasses in industry, I'm more worried about what it means for metalworkers where they potentially have high speed, sharp edged, metal debris impacting the glasses.
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