Generic Outdoor Sports UV 400 Yellow Lens Night Vision Eyeglasses Cycling Eyewear 1) Sports spectacles commonly known as PC bullet-proof lenses, light weight, and not easy to break, can prevent over 95% of harmful ultraviolet radiation. 2) Glasses frames light weight, good flexibility. 3) Yellow lenses: Strictly speaking, not part of the yellow lens sunglasses, because it almost does not reduce the visible light, but in the foggy and dusk, yellow lenses to increase contrast and provide a more accurate video, it is also known as "night vision film ", but also Some people choose to wear the yellow lenses to use as a decoration. 4) 100% UVA/UVB protection, yes, this UV400 protective sunglasses ensure your eyes against UV400 when doing outdoors sports on sunny days. 5) Helps to keep wind and dust out of your eyes, and is perfect for outdoors cycling, mountain-climbing, running, skating and so on.