The Oakley Cybr Dyno (OO9513D) is a high-performance, rimless sport sunglass designed for motion and versatility. This elegant rimless shield lens is held in a lightweight O-Matter™ frame; minimum weight, maximum field of vision. Integrated with Unobtainium® earsocks that keep the pair from slipping even in high sweat situations, the ventilated lens design also enhances airflow to limit fogging. Prizm™ tint technology on this model further enhances contrast and color depth, making it easier for you to see in bright or changing light conditions.