SIZING INFORMATION: This frame size is Medium with a hinge to hinge measurement of 129. Ideal for average faces. FRAME FEATURES: OO9533 HSTN SQ feature a square, matte sand frame and Prizm ruby polarized lenses Oakley Plutonite lenses are impact resistant and 100% UV protection (UVA, UVB, UVC, blue light up to 400mm). PRIZM RUBY POLARIZED EVERYDAY improve color vividness in medium to bright light, blocking 99% of glare. Light transmission: 17% LATITUDE COLLECTION: When you sense a storm is approaching, it is best to be prepared.​ Featuring Transparent Sand, and a game-changing cloudy version called Sandstorm​, with an array of lifestyle lenses O MATTER STRESS-RESISTANT FRAME: Oakley's lightweight, durable frame ensures all-day comfort and protection. Injection-molded thermoplastic O-Matter offers better strength and flexibility than acetate, resisting shifting or deforming over time