Split Time was designed for every day appeal but with features for on the go. The temples were designed to fit seamlessly while wearing a hat and the no-slip Unobtainium nosepiece keeps them comfortably in place. Universally flattering pilot lens shape Integrated side shields to combat backside glare Hat compatible frame and temple design Stress-resistant metal frame accents Constructed of lightweight O Matterand durable C5 metal No-slip Unobtainium nosepads:Increase grip with perspiration Three-Point Fit: Comfort and performance that holds lenses in precise optical alignment Frame suitable for small to medium faces Prizm lenses enhance color, contrast and detail for an optimized experience HDPolarized: Minimizes glare via technology that produces a comprehensive, single-layered lens (optional)