Best-in-class frequency lenses- infused in blocks 45% of harmful blue light. CR39 lens. Superior hard coat for anti-scratch durability. Anti-reflective coatings to mitigate reflections and glare. Super hydro-phobic and oleo-phobic coatings for anti-smudge. Handcrafted acetate designs utilizing state of the art CNC and finishing for fit, function, and durability. People with larger faces like the frame thickness solid feel. Customers with smaller faces like wearing a frame that stands out. Just depends on what you're into.