Product Material: Metal Package LIst：1PCS Eyeglasses The anti-blue light glasses mainly prevent high-energy blue light of 400-500 nm which is invisible to the naked eye. This kind of blue light exists in sunlight, Yuba, computer screen, mobile phone screen, and is suitable for people who use computer for a long time, which can alleviate the symptoms of dryness in the eyes; It can ensure safe and undamaged during transportation by wrapping the air bubble film. Whether you have any questions, please consult customer service before ordering If you like our products, please follow the store and give five-star rating！