The S edition offers a smaller size frame with enhanced lens coverage, and every millimeter of the peripheral view is optimized with High Definition Optics™ in a durable yet lightweight design that takes performance to the next level and brings style along for the ride.Features:- Design: Frame suitable for smaller faces. Same lens proportions as the original Flak 2.0, available in a smaller size- Frame Material: Durability and all-day comfort of lightweight O Matter™ frame material- No-Slip Grip: Unobtainium nosepads and earsocks become tackier when wet to help provide retention- See More Details: Prizm™ Lens Technology engineered to enhance color and contrast to see more detail- Oakley Prescription Lenses: Available with Oakley Authentic Prescription Lenses for consistent high quality in fit, form and function from lens to frame- Fit: NarrowBridge and nosepad:- High bridge fit: Offers a more secure and comfortable fit if you have a high nose bridge and lower cheekbones. A good choice if your nose sits above your pupils.Specifications:- Light Transmission: 30%- Light Conditions: Medium Light- Lens Height: 36.9 mm- Frame Width: 120 mm- Arm Length: 123 mm- Lens Width: 59 mm- Bridge Width: 16 mmTechnology: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.