The Ballistic Crossbow® With Photochromic Light-Adapting TechnologyESS Photochromic Lenses Adapt Rapidly to Changing Light Conditions Fast Adjusting Tint Change50% Activation at 11 seconds90% Activation in less than one minute Visible Light Transmission (VLT) Range: 86%-24% The ESS Crossbow Photochromic eyeshield is created using Transitions® lenses and has redefined performance and utility for eye protection. Its ClearZone™ FlowCoat technology minimizes scratches. The Tri-Tech™ Fit ergonomics offer universal comfort and stability with zero pressure points. Clear ESSOPTICS™ exceed rigorous standards, offering a true view of your objective. And the Crossbows patented DedBolt™ Lens Lock pivots open for quick lens exchange or locks shut for rock-solid retention under impact. Frame Colour: BlackLens Color: PhotochromaticModel: 740-0546UPC: 811533014989