Lens: Zeiss polycarbonate Interchangeable Lens: yes Nose/Temple Pads: soft rubber nose-pad Face Size: large Base Curve: 5 Designed for speed demons and record breakers, the Demos Sunglasses from KOO take our rides to the next level with aerodynamic comfort and top-tier optics. An innovative single-lens frame design makes for superb panoramic vision, while four ventilation ports keep air flowing to prevent any unwanted fogging. Plus, we're happy to have Zeiss's unrivaled optical performance leading us to the podium.