The Oakley Flak 2.0 XL in Steel with Clear Photochromatic lenses is designed to adapt to varying light conditions, making it a versatile option for athletes and outdoor enthusiasts. The photochromatic lenses adjust their tint based on the light intensity, offering clear vision in both bright and low-light conditions. 

 Specifications :

1. Frame:

   • Color: Steel
   • Material: O-Matter- Known for its lightweight and durable properties, this material is designed to withstand extreme conditions while providing comfort.
   • Design: Half-frame design with XL lens coverage for extended peripheral protection and a wide field of view. The steel color provides a sleek and modern look.
   • Fit: Standard fit, suitable for a wide range of face shapes and sizes.

2. Lens:

   • Type: Photochromatic (also known as Photochromic)
   • Color: Clear, which transitions from a clear to a darker tint depending on light conditions.
   • Lens Technology:
     • Photochromatic Technology: Adjusts the lens tint based on the intensity of UV light. Lenses darken in bright sunlight and lighten in low-light conditions, offering optimal vision in changing environments.
     • UV Protection: Provides 100% protection against UVA, UVB, UVC, and harmful blue light up to 400nm.
     • Light Transmission: The clear lenses transition from approximately 85% light transmission (clear) to around 20% (darkened), making them suitable for both bright and low-light conditions.

3. Optical Features:

   • High Definition Optics (HDO): Provides superior optical clarity and sharp vision by minimizing distortion and offering accurate visual experiences.
   • Impact Protection: Meets or exceeds ANSI Z87.1 standards for high-velocity and high-mass impact resistance, ensuring durability and safety.

4. Fit and Comfort:

   • Nose Pads: Unobtanium nose pads increase grip as you sweat, ensuring that the sunglasses stay securely in place.
   • Temple Pads: Unobtanium ear socks provide additional grip and comfort, preventing slippage.
   • Three-Point Fit: Keeps the lenses in precise optical alignment while eliminating pressure points, offering a comfortable and secure fit.

5. Dimensions:

   • Lens Width: 59 mm
   • Lens Height: 38 mm
   • Bridge Width: 12 mm
   • Temple Arm Length: 133 mm

6. Additional Features:

   • Interchangeable Lenses: Although the photochromatic lenses adapt to varying light conditions, the frame allows for easy lens swapping to adapt to different environments (additional lenses sold separately).
   • XL Lens Shape: Provides extended coverage for enhanced protection against the sun, wind, and impact, along with a larger field of view.
   • Prescription Ready: Compatible with Oakley Authentic Prescription Lenses for those who require corrective vision.