Equal dashes swagger and style, the Helm shape is refreshed into a semi-rimless and modern-classic with aggressive lines and an unexpected design twist. A new take on a SPY classic, Helm 50/50 delivers bold style. These half-frame sunglasses are available with our premium HD+ lens tech and Trident(TM) polarization. HD+ lens technology combines the superior clarity of our digitally mastered high definition lenses with the therapeutic and visual performance benefits of our patented Happy Lens. Enjoy enhanced color and contrast, improved mood and alertness, and distortion-free optics in one kick-ass package. Available with polarization, which blocks over 99% of surface glare and is layered and sealed within SPY's lenses to prevent scratching, delaminating, and hazing of your polarized filter Constructed from Grilamid(R), a lightweight frame material ideal for everyday wear due to its strength and flexibility SPY's 6-base polycarbonate ARC(R) lenses are injected in a unique tapered shape to provide optically correct, distortion-free viewing at all angles and prevent discomfort and eyestrain Robust integrated hinges 100% UV protection reduces eye fatigue and long-term sun damage Frame measures 56-20-140