CONSTRUCTION: Constructed from durable stainless steel and Grilamid, a lightweight frame material ideal for everyday wear due to its strength and flexibility ARC: SPY’s 6-base polycarbonate ARC lenses are injected in a unique tapered shape to provide optically correct, distortion-free viewing at all angles and prevent discomfort and eyestrain UV PROTECTION: 100% UV protection reduces eye fatigue and long-term sun damage HAPPY LENS: SPY+’s revolutionary therapeutic Happy lens tech is scientifically tuned to boost mood and alertness while enhancing color and contrast, providing a truly life-changing visual experience MEASUREMENT: Frame measures 56-18-145 / DURABILITY: Robust 3-barrel hinges