Oakley Bisphaera Sunglasses The modern twin-lens design of the Oakley Bisphaera  Sunglasses has been meticulously engineered to optimise both retention and comfort, ensuring your eyewear remains precisely where it belongs, no matter how intense the effort. The lightweight O Matter™ frame material sits at the heart of this versatility. This stress-resistant material has long been a hallmark of Oakley's performance pedigree, offering the kind of all-day comfort that conventional frame materials simply cannot match. Paired with the semi-rimless construction, which sheds unnecessary weight without compromising durability, and combined with Unobtanium® nosepads and earsocks, the Bisphaera sunglasses remain locked in place, no matter what.  Lens Specifications Lens: Prizm Road Light transmission: 20% Light conditions: Bright light Contrast: Increased Base lens colour: Rose   Lens: Prizm Black Light transmission: 11% Light conditions: Bright light Contrast: Increased Base lens colour: Grey