Detailed description Through the US DOT and Taiwan CNS enhanced safety certification. High-strength thick lens for toughness and rigidity. The thickest part is 4mm, which is 2mm higher than the average lens thickness. The lens lock system is more stable when riding at high speeds. The reinforced eyeglass groove makes the glasses family more comfortable and more sensible. The floating lens holder design increases the adhesion between the lens and the cap to enhance the quietness. 360° EPS is fully protected and includes the top styrofoam, cheek styrofoam and chin styrofoam. Built-in EPS Bluetooth headphone slot, reserved for headphone space in the two-legged styrofoam, more comfortable to wear. Inner ink sheet, also known as built-in mirror, built-in lens or sunshade mirror, is a sunglass designed in a safety helmet, with anti-UV400 lens; Optional rear LED warning light. The buckle is made of metal double D buckle, which is recognized as the safest buckle in the world. Commonly used in the market, the buckle is easy to break or bounce when hitting, causing the helmet to fly off and lose protection. Five-piece fully detachable lining, including headliner x1, cheeks x2, ankle strap x2 for easy cleaning and replacement, keeping the scalp clean. Leading the industry to use nano bamboo carbon and COOLMAX combined fabric to enhance the surface moisture removal efficiency, keep cool and dry, and achieve antibacterial deodorant effect. The large lens, also known as the outer lens, is made of anti-UV400 lens. It is also certified by DOT safety, and the eye protection is safe. It will not break with the foot. The quick-release lens design allows you to replace large lenses without any tools. It is equipped with light brown lenses at the factory, and the other colors are available in two colors. The DEVS Dual Exhaust Venting System is used for forehead intake and rear negative pressure exhaust to improve ventilation efficiency. The large cap contains a lens weight of about 1650 ± 50 grams; the small cap contains a lens weight of about 1550 ± 50 grams.