Flying Eyes Cooper Titanium sunglasses are designed to be amazingly comfortable under a helmet or aviation-style headset. These ComfortStyle medium-size frame sunglasses are made of β-Titanium frames and Resilamide™ temples, a material that is primarily used in aerospace. Resilamide™ is a very costly polymer material makes the temples virtually unbreakable and yet super light and flexible. Their 1mm thin temples and their flexibility mean that you will not feel them while wearing a helmet or aviation-style headset. And no more noise leaks while wearing a headset either! They also offer precision manufactured polycarbonate lenses that offer uncompromised clarity and shatter resistance. Each set of Flying Eyes eyewear comes with its own protective case and a soft, microfiber cleaning cloth/bag. And like all Flying Eyes eyewear, they are prescription compatible.