Hand made sunglasses Italian Acetate frame: The acetate we use is a mix of cotton fibre and wood pulp. CR-39 lens: "CR-39" is an abbreviation of Columbia Resin 39. CR3-9 has the highest Abbe value of any lens. An Abbe value defines the chromatic aberration of material, and this effect is generally more noticeable in peripheral vision than when looking through the center of a lens. Lens Category 3: Category 3 in lenses, is considered better than categories 2 & 1. This is because they provide extr Modern Brown Cat Eye Sunglasses For Spring, Spring Acetate Sunglasses With Mirrored Lenses, Spring Mirrored Lenses Sunglasses In Acetate, Formal Acetate Cat Eye Sunglasses With Tinted Lenses, Modern Acetate Cat Eye Sunglasses With Mirrored Lenses, Formal Cat Eye Sunglasses With Tinted Lenses, Spring Acetate Sunglasses With Tinted Lenses, Modern Brown Acetate Cat Eye Sunglasses, Modern Acetate Cat Eye Sunglasses With Gradient Lenses