Featuring a 1-piece “shield-type” 6.25 spherical lens, the XK5 frame-style is crafted from magnesium/aluminum alloy.  XK5 delivers unobstructed vision with no obstruction from the fully adjustable nose-bridge.  The full-wrap Dual-Zone/Zero-Distortion lens delivers 100% UV400 eye protection.  Width: 133mm  Depth: 38mm  Temple Length: 118mm Fits narrow to medium faces.