Forget being locked into one option! The Fusebox sunglasses from Optic Nerve have frames you can wear all day, with four interchangeable lenses to keep you prepared for any light conditions. You'll be ready for 24 hours of high desert hikes or sea-level BBQ's. 100% UV protection to keep your eyes safe no matter what the light or the altitude Polycarbonate lenses exceed FDA standards for general impact resistance Focalpoint lens technology tapers to reduce distortion caused by stamped lens manufacturing Included hardshell case to protect and carry both your shades and lenses Lifetime Optic Nerve guarantee Interchangeable lens design is compatible with prescription lenses Tactilite rubber components keep these shades in place, no matter how hard you sweat TR90 Nylon frame resin has a smooth, hand made finish that won't distort or stretch over time |