Experience peak performance with subtlety and style through Mateo’s lightweight titanium frame, featuring a classic round shape and keyhole bridge with adjustable nose pads, along with premium lightweight materials, high-quality German spring hinges, GUNNAR patented lens technology that blocks harmful blue light and 100% UV, dual-sided anti-reflective lens coating, and compatibility with Asian-fit, also available in prescription; specs include lens width of 52 mm, lens height of 43 mm, nose of 20 mm, frame width of 138 mm, temple length of 135 mm, and a weight of 15.9 grams (without packaging); included with your purchase are a clamshell glasses case, microfiber pouch, microfiber cleaning cloth, and a 24-month warranty.