Spy Logan Sunglasses The unique SPY Happy Lens technology enriches color and contrast while optimizing the transmission of beneficial rays from the sun and rejecting the harmful ones, for increased mood and alertness. Features: Happy Lens Technology boosts mood and alertness Happy Boost Lens Technology maximizes color contrast up to 30 (select models) Virtually indestructible Grilamid frames Pin hinges 8-base polycarbonate ARC lenses Bridge width: 15mm Temple length: 121.5mm Lens width: 60mm