High-Strength Lightweight Materials, anti-wear, anti-drop, lens light, resin HD, optimized thickness design, light weight, ultra-thin, sturdy, scratch-resistant, waterproof and oil-proof, providing reliable safety protection. The progressive lens has no obvious dividing line between the focal points, smooth and no image jumping, no need to remove the glasses, moving the line of sight from top to bottom, you can see the far and near and the different visual areas of the lens.