Brand： ROCKBROS Style: Photochromic/polarised glasses Weight: approx.28g（Photochrome）, approx.25g(Polarised) Lens material: polarised (TAC), photochromic (PC) Frame material: TR90 frame Size: LFrame height: (approx. 6.2 cm); Lens width: (approx. 14.25 cm); Outer width of the frame: (approx. 14 cm) Colour: Photochromic (Transparent frame light blue, Transparent colour, Light purple, Transparent frame orange blue); Polarised (Pale pink, Black frame orange red, White frame blue, Pink-purple) Gender: Unisex adults Activities: Cycling Fishing Running Golf Features： There are two types of polarised/photochromatic glasses to choose from. The polarised lenses are made of TAC and the photochromatic lenses are made of PC. The frame material is TR90. Polarised lenses: Restore colours correctly, resist harmful light and protect the eyes. Reduce safety risks due to blurred vision. Photochromatic lenses: The stronger the ultraviolet rays, the darker the colour of the lenses. When you return to the interior, the colour of the lenses automatically becomes lighter, ensuring safe vision, including the transparent version is fog-free (only the transparent version, not others). TR frame: The high-strength and lightweight frame is not only resistant to bending, but also comfortable to wear and reduces head pressure. Brightening lenses: We include brightening lenses that increase contrast and improve vision when worn at night. Seamless mirror lens: The one-piece mirror lens provides a clear view and reduces safety risks that could arise from restricted vision. Ventilation openings: Multiple vents at the top of the lenses reduce air resistance while riding, reduce heat build-up and prevent fogging. Only the transparent lenses have an anti-fog function. Complete accessories: The cycling glasses come with a practical glasses case, a polarisation test card (only polarised glasses included), replacement nose pads, a glasses bag and a glasses cleaning cloth for compliance. So you have everything you need for the care and storage of your cycling glasses in one set.