Sundog Zup Sunglasses The Zup features a MaxFlex RILSAN ® frame with Premium Sundog Mela-Lens Performance. Melanin is produced by the human body and is a natural defense against the negative impact of the ultraviolet and more importantly, the High Energy Visible Light (HEVL) portions of the spectrum. Mela-Lens ® represents “The Advantage” of superior light filtration. This fashionable style will garner the looks, featuring a smooth balance of sport inspired style and fit with classic oversized lenses Product Features: De-Centered SD-C7 8 Base Lens MaxFlex RILSAN ® Frame Mela-Lens Technology 100% UVA/UVB filtration up to 400 nm Full Frame Design Case and Cleaning cloth Not Included!!!