John Dalia Project 09 C605 Sunglasses combine a sturdy 8mm acetate rectangular frame with gradient CR39 lenses and built-in NFC authentication for provenance verification. Key attributes: Black | Silver | Acetate | CR39 gradient lenses | Anti-reflective coating on inner surface | 100% UV protection | Embedded passive NFC chip in right temple for authentication | Exposed wirecore | Includes carrying case and cleaning cloth | Squared rectangular shape | 8mm shiny acetate frame | Silver decorative pins | Platine-colored stainless-steel accents | Sculpted acetate temples | Dimensions & fit: Eye: 49 mm | Bridge: 22 mm | Temple: 145 mm | Square frame; best on medium to large faces | Composition & care: Acetate | Stainless steel | CR39 | Wipe lenses with a microfiber cloth and store in the supplied case. Avoid contact with solvents and prolonged exposure to heat.