Flying Eyes Golden Eagle sunglasses are designed to be amazingly comfortable under a helmet or aviation-style headset. These ComfortStyle sunglasses are made of Resilamide™ frames and temples, a material that is primarily used in aerospace. This very costly polymer material makes these glasses 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!