The latest evolution of an Oakley favorite, it features our coveted HIGH DEFINITION OPTICS® (HDO®) for unbeatable clarity and protection. Lightweight C-5™ alloy is the reason why it feels comfortable all day. Temple sleeves of soft UNOBTAINIUM® increase grip with sweat while spring hinges balance the fit. The Square Wire meets all ANSI Z87.1 standards for optical performance and impact resistance.