Oakley® Taps Into Its Surfing Heritage With Hydra, A Razor Blades-Inspired, Semi-Rimless Sunglass With A Shield Lens. Featuring The Oakley B1b Logo On The Temples, Hydra Is Accentuated By A Modern Trigger Stem Design, Reminiscent Of Razor Blades´ Origins In Surf Culture. A Plant-Based Bio-Matter™ Frame And Three-Point Fit Helps Provide Balanced Fit And Comfort While Prizm™ Lens Technology Enhances Color And Contrast.Features:- Design - Razor Blade Inspired, Semi-Rimless Cylindrical Lens Shape- Frame Material - Lightweight, Durable Bio-Matter® Frame With Tuned Flex For Balanced Fit, Comfort, And Head Retention. Bio-Matter Is Made From Bio-Materials Having At Least 56% Bio-Based Carbon Content (Representing Ratio Of Castor Oil To Fossil Sources)- All Day Comfort - 3 Point Fit With Razor Blade Inspired Stem Design- See More Details - Available With Prizm™ Lenses That Are Designed To EnhanceSpecifications:- Light Transmission: 12%- Light Conditions: Bright Light- Contrast: IncreasedTechnology:Impact Protection:- Oakley Lenses Are Designed And Tested Under Extreme High Mass And High Velocity Circumstances To Ensure Uncompromising Protection Across A Wide Range Of Demanding Conditions.