TR90 MATERIAL FRAME:TR90 is an incredible material that is impressively lightweight,sturdy and flexible,make for a perfect pair of glasses.They always used to create the most comfortable,durable eyewear frame available
SPRING HINGES:Spring hinges sunglasses will offer all the flexibility and utility you want and allow the arms to extend past the traditional 30 degree range of movement when opened the sunglasses.Protects your glasses from bending or breaking,provide a higher level of comfort.
POLARIZED LENS:The polarized lens provide crystal clear vision and reduce glare-causing reflections from flat surfaces.Against harmful UV rays,make sure your eyes are fully protected when you driving or other outdoor activities.