K ION NANO SPEC PREMIUM 8 glasses with a bright black square frame from K-LINK ORIGINAL provide top-quality protection against blue light and radiation. The TAC lenses are light yellow, non-prescription, and block blue light and UV rays. The full frame is made of plastic and negative ion materials, while the titanium alloy temples are ultra-light, durable, and resistant to fading. At only 15g, these glasses are perfect for business, fashion, and leisure styles. Wthese glasses also come with a packaging box, glasses cloth, manual, and case, and have the added benefits of far-infrared and photochromic lenses.