The RB4264 Chromance feature functional design with a casual twist like the subtle frame design with temples in dark sanding tones. The chromance lenses calibrate the light to provide clearer and sharper vision. Ray-Ban sunglasses sold by authorized sellers, like Amazon, are eligible for all manufacturer warranties and guarantees. Click on the Ray-Ban link above the product title to shop the entire Ray-Ban sunglass and eyeglass assortment.