SevenFriday Sunglasses Cortex, SAF1/02. Square Frame: Crystal clear polished acetate frame • Matt stainless steel inner rim. • Inserted silver polished square-cushion shape signature. Temple: 145mm. \"7F\" icon logo on each temple has architectural trellis core wire in horizontal brushed stainless steel Crystal clear polished and matte acetate merge together with a black matte acetate temple tip. \"7F\" icon logo on the inside left temple. Lenses: CR39 warm green lenses with blue anti-reflective coating on the inside. • Category 3 • 100% UVA/UVB protective lenses. NFC Chip: NFC Chip embedded in the left temple tip allows authenticity verification via the SEVENFRIDAY App and the NFC scanning station. Packaging: Packaged in a collapsible natural cork box with red cleaning cloth.