All of our night driving glasses are made from triacetate cellulose – or TAC for short. There are 7 layers that make up TAC lenses. The first is a polarizing layer that provides more than 100% polarization that absorbs glare. The second and third layer allows durability that resists harsh environments. The fourth and fifth are UV absorbing layers that absorb over 99% ultraviolet rays. The last two layers, are shock proof layers that increase impact and scratch resistance. The best TAC Polarized Lens are those that block more than 99% of harmful UV rays with wavelengths up to 400 nanometers. Rest assured, all of our night glasses feature UV400 TAC Polarized lenses that were manufactured using a 7 layer process in accordance with the international driving glass lens standard. Not only that our night driving glasses are fashionable and sustainable, but also provide maximum UV protection for driving and outdoor activities. For those with photophobia or better known as light sensitivity TAC Polarized night vision glasses are your best friend. TAC Polarized Lens with UV400 Protection Coating Light scatters without direction and when it hits flat surfaces, the reflected light becomes polarized, in other words, it is less scattered and more aligned. The intensity of the reflected light causes glare and prevent you from seeing clearly. This is where polarized lenses come in handy because they have a filter specially made to block this glare. UV 400 protection coating provide nearly 100% protection from harmful ultraviolet light rays, blocking wavelengths up to 400 nanometers, including UVA and UVB rays. Ultraviolet, or UV, rays are electromagnetic radiation from the sun. Read more MODEL 5188 MODEL 8559 MODEL SO888 Aluminum and Magnesium Frame SOXICK NIGHT DRIVING GLASSES use aluminum and magnesium frame, lightweight and durable. Flexible Arms Flexible arms for convenient carry. Comfortable Nose Pads Comfortable nose pads is replacement. Read more