After hundreds of improvements, our designers reduced the thickness of the lenses to 3.5mm and the thickness of the eyeglass cases to 7mm. The magnetic box can be placed on any iron item without worrying about loss. After thousands of tensile and squeezing tests, our Presbyopic Glasses are still intact, so they can stay with you for years without breaking. In addition, reading glasses also have the function of preventing blue light and reducing the damage of radiation to the eyes. This Presbyopic Glasses uses austenitic-ferritic duplex stainless steel frame and high-quality resin lenses, so its weight is only 12-15g grams. This is a small number, so wearing it on the nose does not cause pressure and friction in the nose. Stylish frame structure design allows middle-aged and old people to be at the forefront of fashion. So customers can wear it in any occasion and you will always be the focus of fashion, easily controlling all occasions. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.