1-Year Warranty: You can contact us directly by clicking on your order to get a refund. We offer a one-year unconditional money-back and merchandise warranty. Great Value: 1 flat hard glasses case with soft lining to prevent the lens from scratches; 1 strong double-sided tape to stick glasses to other surfaces; 1 eyeglass cleaning cloth; available in matter black, burgundy, transparent white. PREMIUM MATERIAL: The frame is made from Swiss EMS tr90, which has better elasticity and toughness. The temples are made of premium metal material, durable and attractive. Alleviates eye fatigue: The lens has anti-blue ray coating which can prevent harmful blue light and UV400 protection, alleviating visual fatigue and discomfort caused by various digital screens. Simple and portable: Thin but not too small lens design that does not affect your vision, can be put into the pocket of your shirt or jeans, or attached to your mobile phone, perfect for going to restaurants to read menus, browsing mobile phone messages outdoors, etc.