Hulislem Blade  Sport Polarized Sunglasses-FDA Approved STRESS RESISTANT TR90 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 TR90 Frame can withstand whatever you dish out and more. 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 along with color contrast, as well as clarity. 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. 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 eyes since light with wavelengths below 400 nanometers are the ultra violet light range and can cause damage to the eyes. This means that these glasses give you complete UV protection.UVA, UVB, UVC, Blue Light or any kind of harmful light you can think of