Desc. Features Specs & Guarantee These are perhaps the greatest enhancement to the Vise Z87 ever - Introducing seamless BI-FOCAL lenses that allows you to literally enhance the environment around you.These BI-FOCAL lenses feature no visible lens cuts on the exterior, and take up roughly the lower 20% of the lens for a non-intrusive magnification that works seamlessly in everyday scenarios.The BI-FOCAL saves the day when your eyes are struggling to make heads or tails of smaller text or you're just trying to score a better view of what you're working on.Available in the Vise Z87 and XL Vise Z87 in magnification ranges from 1.0 - 2.5THESE ARE ONLY MAGNIFIED IN THE BI-FOCAL PORTIONIf you've got a big head these are the glasses for you!  You asked and we listened - the first pair of extra large Heat Wave frames specifically designed for the Godzilla customer are finally ready to smash out our warehouse doors. We took  the time-tested design of the Vise and added an extra 10mm in width and jacked up the height to 54mm to provide larger than life comfort and coverage.  The XL VISE also meets ANSI Z.87 impact requirements and is compatible with our Vise Side Shields to give you the Z87+ protection for the toughest jobs on the yard.  The XL VISE Z87 meets OSHA eyewear specifications for jobs not requiring side shields and chemical splash resistance. -Includes Microfiber bag-Matte Black frames & Metal inlay logos -California residents, please read the Proposition 65 warning Disclaimer: Removing arms, lenses and or changing configuration in any way voids Z87 compliance. Z.87 compliant, U6L3 - UV400 - 100% UVA / UVB blocking.Shatter-resistant polycarbonate lenses.Durable polycarbonate frame construction. 100% Satisfaction Guarantee - If you are unhappy with an item for any reason we will gladly accept unworn product in it's original packaging for full refund within 60 days from the date you received it. Warranty: We fully back all of our products against manufacturer's defects. If you have any issues, we will replace any defective or malfunctioning part at no charge. For more information on our warranty policy please visit: Heat Wave Visual Warranty and Returns