The anatomical frame of our BLOC Cobra hugs the face ensuring the remains in place. KARBON TX™ bi-core injected frames are hand finished. They are flexible, durable, lightweight and designed for comfort, fit and performance. The sports hinge provides both strength and performance. The hypoallergenic nose pads and the non-slip hypoallergenic temple tips are designed for comfort and fit.   Details: Sports hinges Lightweight BX1000 core injected temple tips Metal branding Suitable for medium to large faces Category 3 grey tint lenses.