V-TUF SUN GLASSES - UV400 protection

The safest bet is to buy sunglasses that provide 100% UV protection, or UV 400 protection. That means that the glasses protect your eyes from both UVA and UVB radiation. Most expensive sunglasses offer this level of protection on all models. ... Source: Google

What does UV400 mean?

The designation UV400 with guaranteed UV protection protects against harmful UV-B and UV-A radiation. Furthermore, the sunglasses reduce visible light, which makes seeing in the sunshine more pleasant. In short, the term UV400 means that the glasses absorb UV-A, B and C rays, up to a wavelength of 400 nanometers... Source: Google