Mineral glass lens. Category 3, UV protection: 100%. Infra-red: 66%, visible light absorption: 75%, harmful blue light: 89%. Backside anti-reflective, oleophobic, hydrophobic, red flash. Reinforced five-barrel hinges. Detachable cord with steel fastener. Lens: 64 mm. Bridge: 13 mm. Arms: 145 mm. Made in France.