Warranty: you have no risk to try and we will provide the best service to guarantee 100% satisfication! If there's any problems, please feel free to contact us. Size: 50-17-141 (Lens Width 50mm, Lens Height 46mm, Bridge Width 17mm, Temple Length 141mm). Material: frame TR90, 11g, ultra lightweight, no pressure on ears for long time wearing. Resin Lens , oval shaped frames, crafted with reinforced metal hinges to ensure durability and avoid breaking. Transparent lens, high light transmittance with no noticeable yellow tint to prevent color distortion, minimize glare from digital screens. Reflect and filter 85% of harmful blue light, prevent color distortion, 7-layer anti-reflective coating to reflect and filter blue light,reduce eyestrain and sleep better.