A visual machine like no other: Powerful, versatile, unstoppable – The XL Vector is engineered by Heat Wave Visual for ultra dynamic performance in a Z87+ complete package. The XL version encompasses the same principle behind our best-selling XL Vise, and applies that to the Vector right out of the gate. That means this version of the Vector is made specifically for our cranial endowed customers – being 10mm wider and 5mm taller makes it perfect for LARGE HEADS. Meets Z87+ Requirements: Each pair meets or exceeds Z87+ Standards right out the box. Our lens is injection molded from thick 1.9mm shatter-resistant polycarbonate that is built to withstand Z87 Mass Impact Standards.  Integrated side-shields provide lateral protection and allow the frame to meet ANSI Z87+ requirements. Each pair of Vector is boldly marked Z87+ on the frame, arm and lens. Disclaimer: Removing arms, and or changing configuration in any way voids Z87 compliance. Lens Technology: 1.9mm thick Polycarbonate lens that meets or exceeds mass impact requirements for Z87 standards, injection molded to the highest standards and tested to ensure optimal clarity, along with color and light transmission standards. We use only the highest quality polarizing filters on our lenses for optimal glare reduction and supreme clarity *Available in both non-polarized and polarized options* Lenses are U6:L3 UV400 - 100% UVA / UVB blocking Firestorm Lens VLT = 14% / Cat 3Firestorm Polarized Lens VLT = 12% / Cat 3