These sports glasses are built to last and are perfect for getting outdoors in. The frames are flexible and highly resistant to impact, making them great for high-intensity activities where they might be dropped. The CX lenses are decentred, ensuring clear vision and reduced distortion. The mirror coating on the lenses also helps to reduce glare and provide extra protection from the sun. Additionally, the glasses come with an extra clear lens, making it easy to adjust to different lighting conditions.CX: Environmentally friendly produced frame and lensBPA FREEDecentred lenses made from CX material100% UV protectionMulti lensChangeable lens systemAnti-slip temple tips and nose pads