Authorized Protective Eyewear List APEL Approved The ESS Crossbow has redefined performance and utility for eye protection. An industry-fit for eye shields, Crossbow's ClearZone FlowCoat technology minimizes scratches and provides unmatched anti-fog capability. The unique Tri-Tech Fit offers universal comfort and stability with zero pressure points. Strikingly-clear ESSOPTICS exceed rigorous standards, offering a true distortion-free view of your objective. And the Crossbow's patented DedBolt Lens Lock pivots open for quick lens exchange or locks shut for rock-solid retention under impact.