• Blue light blocking: Blocks 90% of visible light between 415 and 455 nm, reducing eye strain. • Comfort and durability: Retro round style, strong and transparent polycarbonate material. • Daily use: Suitable for office, reading, computer games, and more. • Spring hinge: Flexible fit for all face shapes. • Total frame width: 140 mm. • Lens height: 38 mm. • Lens width: 45 mm. • Arm length: 135 mm. • Bridge: 18 mm. • Frame and temple material: TR90. • Net weight: 47g.