Spy Tron Sunglasses - Checkers / Grey Gradient Mirror

What is Epsylon? It's a comfortable composite plastic with high tensile strength that is lightweight and resilient to a wide range of temperatures. The high tensile strength makes the hidden hinge system possible.

What is an 8 x 4 Base lens? A lens' Base refers to the amount of arc in the lens and therefore the arc in the frame. A 6-Base is a more flat, square shape creating a more scholarly look. A larger base like a 9-Base is more wrapped and therefore will appear more suited for active endeavors. In 8 x 4 the 8 refers to the horizontal arc and the 4 refers to the vertical wrap.

What is a Toric Lens? The horizontal and vertical Base curves are different.

What is an ARC lens? Holly smokes - all these lens questions! In short, it's Spy's optically correct distortion free lens. ARC stands for Accurate Radius Curvature. The lenses become thinner as they move away from the optical center of the lenses thereby eliminating any distortion.

Any warranty? Yep. Spy provides a one year warranty from the date of purchase to replace any product or portion thereof which is deemed a manufacturer's defect.