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.