The obvious advantage of mask sports sunglasses is that they provide a wider and unobstructed view. This is because the single-face mask lens is not blocked by the nose bridge of the dual-lens sports sunglasses. This function is useful for cyclists who often like to observe the instrument on the handlebars and observe the road without moving their heads. The overall lens of sunglasses is larger than single lens sunglasses, which means they can filter more light and provide better UV protection and impact protection.

If you choose face mask sports sunglasses, they will be much lighter than rimmed sunglasses. This is very useful for long-term exercise/comfort comfort. In theory, the optical clarity of mask sports sunglasses should be inferior to dual-lens sports sunglasses, because the lenses must bend at a greater distance and two planes (vertical and horizontal) . It is more difficult to develop production methods for larger monolithic polycarbonate lens materials and therefore may be of lower quality.

For this reason, I recommend never buying a cheap pair of mask sports sunglasses, because the optical clarity may be poor, and they may be made of defective or reused polycarbonate lens material. Which good factories dumped on the market, and then these materials were used by notorious lens manufacturers. Most people just buy a pair of cheap sports sunglasses without realizing the difference in lens quality and optical distortion in the store under artificial light!

The main advantage of dual-lens sports sunglasses is that for poorer quality sunglasses, the optical clarity should be better because it is easier to make smaller polycarbonate lenses. The curvature of the lens is smaller, and the chance of causing optical distortion is lower. Second, two separate lenses are generally stronger, especially in terms of impact damage. This can be a useful advantage if cyclists and mountain bikers expect objects to hit the lens.