UV 400 indicates an eye protection item that has been optimized to prevent eye exposure to both UVA and UVB radiation. Eyes are exposed to sunlight could be at risk for serious damage to their eyes, which can lead to a number of issues including cancers of the eye, vision loss, cataracts, and blindness.
Safety Planet provides different lens types with UV protection: UV 400 Cycling Glasses, UV 400 Glasses for Outdoor Sports, UV 400 Ski/Snowboard Goggles.

Removing eyewear to wipe away fog can expose your eyes to potentially dangerous hazards and debris in your workplace. Anti-fog technology help people see clearly.
Fog Free can be applied to plastic, polycarbonate and other eyeglass lenses, including high-index lenses and Transitions photochromic lenses. Your lenses and vision stay clear when you make the transition from a cold environment to a warm one. It may also keep your lenses from fogging up during sports and other times you are hot and perspiring.

Lenses that are treated front and back with a clear, scratch-resistant coating have a much smoother surface that is more resistant to scratching.
The coating does not interfere with how the lens functions and does not affect vision. Though an anti-scratch coating is not 100% scratch-proof, but it helps to prevent minor scratches that can easily happen to a regular lens. These minor scratches can damage the surface of the lens and impair vision. An anti-scratch coating acts as a protective layer thus making the lenses more durable and safe.

Our sunglasses use vents drilled into the frames or the lenses themselves at precise positions, where air is prone to stream past without creating turbulence that can make it hard to see. Glasses without these holes for ventilation can create warm air pockets behind the lenses, which compound the problems of sweat around your eyes.
Proper ventilation allows the lens and air temperatures to equalize quickly. When the lens returns to air temperature fogging disappears. Our innovative exhaust vents to lenses and frames to facilitate better airflow.

Comfortable rubber temple tips and nose pad can be adjusted to accommodate any face.
Adjustable nose pads are a perfect remedy to the plastic eyeglass or sunglass frame that just won’t fit properly. Adjustable nose pads are also a good solution for long eyelashes or just to keep your sunglasses off your cheeks. The shape and angle of the multi-plane nosepiece can be adjusted to accommodate any nose bridge for a truly custom fit.

Polycarbonate is the material favored by most sports eyewear manufacturers because it's very light and shatterproof, which is an impressive impact resistant lens. Being flexible is what enables it to absorb energy without fracturing. Polycarbonate lenses are more impact-resistant than plastic or glass lenses. PC lens provide a very high degree of eye protection.

The sun’s rays reflect light in every direction, so when a ray hits a flat surface, the reflected light shines back at your eye and is magnified, causing glare. It reduces your depth perception, distorts your view and color perception. Regular sunglasses are designed to only reduce the amount of light that is transmitted through the lens horizontally and vertically. But the polaroid layer on the lenses of sunglasses is designed to absorb horizontal light waves, while still allowing vertical waves to pass through. Because light only travels in one direction through polarized lenses, glare is eliminated.

Advantages:

Reduce Glare - On a sunny day, you may notice that objects in the distance appear hazy, or nearby vehicles are reflecting light in a way that is nearly blinding. A polarized lens removes the effects of glare by blocking reflections. This improves eye comfort and allows you to take in the view without squinting

Water Sports - Without polarized lenses, the water’s surface simply reflects everything around it. This obscures view into the water almost completely. Polarized lenses block this reflection and enable the wearer to see the contents of the water instead of the sky.

Reduce Eyestrain - Another nasty side effective of glare, eyestrain can be relieved with polarized lens wear.

Better Vision - Wearing polarized lenses can reveal colors and images like never before. You will see crisply and cleanly, with a level of detail that may astound you.

A polarized lens can also be photochromic - the lens gets darker or lighter depending on ambient light levels. We also have polycarbonate polarized lens which is more impact-resistant for industrial use.