Desc. Features Specs & Guarantee We love hearing from customers who tell us that they practically live in their Heat Wave sunglasses, so now we're giving you a reason to wear them even more by outfitting these XL Vises with wizard-like photochromic lenses. A smart fella somewhere with a big computer invented these adaptive lenses to adjust from a clear to dark tint depending on your environment in under 30 seconds. These will NOT get as dark as our standard Black lenses.We picked a photochromic lens to provide ideal clarity indoors and as dark as possible outdoors to maximize the wearer's utility of this eyewear. The variable tint range of these lenses adjusts from a very clear 78% to a very chill 14% VLT of darkness, all in under 30 seconds. So when you're inside your garage grinding you'll have crystal clear, z87 protection. When it's time to jam outside for the 5th Home Depot run of the day, the lenses will smoothly change from clear to grey in a matter of seconds. This is just one of the many product improvements we're rolling out to ensure that our customers are getting the most out of their Heat Wave eyewear. From riding, to the job site and all the way back home in the shop, the VISE Z87 has you covered.These XL Vises feature Variable Tint Photochromic Lenses with a VLT range of 78-14% 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