PREMIUM C3 LENSES: With anti-scratch, anti-fog, and anti-reflectance coatings plus super-hydrophobic and oleophobic coatings for anti-spotting, fingerprint resistance, and easy cleaning. STAINLESS STEEL FRAME: high strength-to-weight ratio, strong environmental stress and corrosion resistance. 50% LIGHTER THAN TRADITIONAL ALLOYS WHILE RETAINING TENSILE STRENGTH PATENTED GEKO PADS: Providing optimal multi-directional traction and comfort that get stickier when exposed to sweat and water.