Classic Strand Sunglasses feature durable TR-90 frames and premium polarized lenses with 100% UV protection. Anti-scratch coatings and optically correct design ensure clear, comfortable vision. Includes microfiber bag. Keeping it pure and simple in a classic lens shape THE STRAND Sunglasses are made with Ultra-Lite injection molded TR-90 unbreakable nylon TR-90 will not lose its shape in the most extreme temperatures and was developed for its properties of strength, flexibility and memory retention Premium-quality polycarbonate lenses are constructed in five layers and are 2.0mm thick Polycarbonate is ultra-lite and unbreakable with anti-scratch hard coatings applied Polarized lenses significantly cut glare and reflections for an all-around more soothing viewing experience Optically correct which means no distortion Optically correct lens are crucial for long wear and accurate vision Pleasure Ground uses long lived and supremely wearable Grilamid for all their injected frames 100% A&B UV protection protects your eyes from harmful aging and burning UV rays Base" has to do with the amount of curvature a lens has These 8 base lenses provide complete coverage and great frame fits Comes with micro fiber bag Sunglasses are the most widely available ophthalmic devices sold over the counter that are regulated by the FDA