The SINNER FONDS sportstyle sunglasses are the perfect combination of style and functionality. Features: Polarised SINTEC® lens ensures clear vision: Eliminates reflections from flat surfaces, thus providing greater visibility and comfort Reduces 99.9% of blinding glare while filtering blue light to increase contrast and improve depth perception in a wide variety of weather/lighting conditions Has a soothing effect on the eye and reduces eye strain 100% UV protection Steel hinges are integrated into the frame for extra durability Anti-slip coating on rubber nose pads and temple tips Nickel free Polarised SINTEC Brown Red Oil Lens: Category 3: 15% light transmission Suitable for low to bright light/sunny conditions Polarised SINTEC Green Oil Lens: Category 3: 15% light transmission Suitable for low to bright light/sunny conditions Polarised SINTEC Smoke Orange Oil Lens: Category 3: 15% light transmission Suitable for low to bright light/sunny conditions