These are the highest quality X Loops. Everything about the design and construction speaks quality. Youll have no trouble looking good wearing these. The XP1 is a polarized glass, which reduces glare from reflections, such as from the surface of a road or water. It has a fine copper metal frame with spring hinges, for extra comfort and durability. The design of the temples helps to reinforce and strengthen. They are extremely comfortable, with soft temple tips and adjustable nose pads. The bronze lenses also provide 100 percent UV400 protection. Measures 36m tall, 170mm long, and 138mm wide.