These stylish sunglasses have been handmade from acetate, which is a premium, luxury material that offers superior strength and a high quality shine. To achieve this premium look, production goes through 55 stages, and the product is tumbled for 72 hours to achieve the polished look on the frame. Close We even provide you with a hard back protective case and lens cloth to keep them looking as good as new! These sunglasses are glazable, which means you can take them to the opticians to have prescription lenses put in The fit can also be adjusted by an optician Provides maximum UVA/B protection Filter category 3 - solid smoke lens Full frame Exceeds European standard BS EN ISO 12312-1, American standard ANSI Z80.3 and Australian/New Zealand standard AS/NZA 1067 90% acetate 10% CR39