Premium Materials & Craftsmanship,Exclusive Materials: Premium titanium, 18K gold plating, and cellulose acetate for exceptional lightness and durability. Hand-Finished Excellence: Each frame undergoes meticulous hand-polishing and assembly by master artisans for flawless details and ultimate comfort. High-Definition Polarized Lenses: Custom lenses with 100% UV400 protection and anti-glare technology. Water, oil, and scratch resistance: Data from laboratory tests. For the same product, minor variations may exist between different batches and colors, which do not affect product performance UV400 sun protection performance, 999% UV blocking rate, 96.9% anti-glare, 99.3% anti-reflection rate.syi