Hulislem S2 Italian Engineered Polarized Sunglasses for an Active Lifestyle TR90 frame plastic lens polarized Lens width: 3.1 inches LIGHTWEIGHT POLYCARBONATE FRAME: YOU WILL FORGET YOU ARE WEARING THEM In the middle of an adventure you cannot let heavy sunglasses weigh you down. The Hulislem have therefore been designed to be extremely lightweight (you won't believe how much unless you hold a pair in your hands). It is especially great for those who are not used to wearing glasses. DUAL LENS POLARIC ELLIPSOID GEOMETRY Each of the lenses are cut from one single toric lens. And incorporate the amazing Dual Lens Polaric Ellipsoid Geometry. This means that you get amazing depth perception, color contrast as well as clarity. STRESS RESISTANT O MATTER FRAMES An active lifestyle means that your sunglasses will have to be tough and rugged enough to meet up to whatever challenges you throw at it. The specially designed Stress Resistant O Matter Frame can meet up whatever you dish out to it and more ACUTINT LENS COLORING SYSTEM These sunglasses are equipped with the cutting-edge AcuTint coloring system. Which means that they do not distort the natural colors while adding color contrast. So, your vision is enhanced without being warped. And you can still see natural color in all its glory. UV 400 MIRROR FLASH COATING The lenses are mirror flash coated. Which not only limits the amount of light that your eyes are exposed to, but also ensure that no light of wavelength 400 nanometers and below reach your eye. Since light with wavelength below 400 nanometers are the ultra violet light range which can cause damage to the eyes. These means that these glasses give you complete UV protection.UVA, UVB, UVC, Blue Light or any kind of harmful light you can think of