The recommended key point for sunglasses is lenses, which can be divided into five common lens materials: glass/PC/resin/nylon/TAC lenses.

Glass lenses are commonly used in high-end sunglasses, with excellent optical performance, and are not easily scratched, but they are not UV resistant (unless specially processed), easy to break, heavy, and high in production cost.

PC lenses are high-end PC lenses commonly used by athletes. They are a type of plastic that is lightweight, and high-strength, but not wear-resistant. They can be classified into high and low-end lenses, and their optical performance is unstable.

Resin lenses are very popular among fashion enthusiasts. They are UV resistant, lightweight, and resistant to high temperatures. They have strong coloring ability, beautiful colors, and a concave shape that is perfect for use.

Nylon lenses are currently the best lenses, with good optical performance, strong impact resistance (not easily broken), lightweight, and 100% UV protection, but high cost, and easy to scratch.

TAC lenses are corrosion-resistant, lightweight, easy to scratch, widely used, and have unstable optical properties. However, polarizing lenses require this material.

Before recommending a brand of sunglasses, there are a few things you need to know: choose one with good stability. If you shake your head or jump, it will definitely fall out of size. Comfortable, the mirror feet are too tight, causing headaches. Don't you want to return them to practice Iron Head Skills? Adjustable, the height, width, and width of a person's nose can vary. If the nose cannot be adjusted, the adaptability is very low.