Brow made of Grilamid TR 90, a homopolyamide nylon characterized by an extremely high alternative bending strength, low density, and high resistance to chemical and UV damage. Adjustable ear and nose pieces for a customizable, comfortable fit.POLARIZED T IPTifosi polarized lenses are exceptional, because they are injected with polarized material and decentered for greater clarity. Polarization blocks light reflecting off the water or any horizontal surface to reduce glare and eye fatigue. These lenses are perfect for watersports, driving, and casual wear. Tifosi Polarized Interchangeable styles feature three lenses: a Brown or Smoke Polarized,AC Red, and Yellow to brighten an overcast day.