Zheino 1909 Night Vision Driving Polarized Sunglasses, Clip-on Flip-up Sunglasses, UV400 Anti-glare Polarized Sunglasses Yellow Frame Material: Plastic + Metal. Optical structure: Clip, maximum UV400 protection. Super light weight, Fresh and Comfortable. Size: Frame total 129mm; Lens width 58mm; Lens hight 43mm; Bridge 12.3mm. Purchased these flip ups so you could drive on bright sunny days without eye strain. These work very well and were not too expensive. You can also flip them up if need be. They are easily adjusted and cover your glasses completely.