Performance XL VISE Sunglasses Frame: SUPER Photochromic Lens Z87+If our standard Photochromic lenses are wizard like, the Super Photochromic is the Archmage of lens transition. Super Photochromic lenses get way darker than before by going from a mildly tinted 31% to an ultra dark 7% VLT. From rummaging through your toolbox or taking a direct hit of retina roasting raysyou get the perfect level of shade. Boasting the same great features as the standard Vise, The XL version are (you guessed it) EXTRA LARGE Heat Wave