SPY Optics Alpha sunglasses are sport-ready, with premium, flexible Grilamid frames that are shatter- and glare-resistant, comfortable and ready for whatever climate youre in. The Signature Scoop venting system combats lens fogging. The Arc (Accurate Radius Curvature) lenses are made of impact-resistant polycarbonate, and the 8-base curvature provides high-quality, optically correct, distortion-free vision. Built-in hinge system provides flex and comfort. Hytrel rubber nose pads and temple tips. 100% UVA, B and C protection. Medium- to large-sized fit.