Explore anywhere with Shackle, a frame built for comfortable, everyday use. The full-rim, soft square frame shape boosts Shackle’s style-factor while the lightweight O Matter™ front ensures durability to support an on-the-go lifestyle. The Unobtainium® nosepads and slip-on earsocks help keep the frame securely in place with a secure fit for those all-day adventures. Order Shackle with Oakley Authentic Prescription Lenses for consistent high quality in fit, form and function from lens to frame. Features: - Design: Full-rim frame designed for an an on-the-go lifestyle - Lightweight And Durable: Lightweight O Matter® frame helps provide all day comfort - Personalized Fit: Wire core temples help provide an adjustable fit - No-Slip Grip: Unobtainium nosepads and earsocks become tackier when wet to help provide retention - Oakley Prescription Lenses: Available with Oakley Authentic Prescription Lenses for consistent high quality in fit, form and function from lens to frame - Fit: Regular Bridge and nosepad: - Low bridge fit: Offers a more secure and comfortable fit if you have a low nose bridge and higher cheekbones. A good choice if your nose sits lower than your pupils. Specifications: - Light Transmission: 34% - Light Conditions: Snow & Overcast - Lens Height: 45.6 mm - Frame Width: 137 mm - Arm Length: 137 mm - Lens Width: 52 mm - Bridge Width: 18 mm Technology: 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.