The strength of the Alpina Lyron HR VL sports glasses is their half frame, which offers modern style, outstanding protection and maximum range of applications. This keeps you as safe as possible during sports while still looking good. The Varioflex lens technology is used in addition. It ensures optimum visibility in all weather conditions. The lenses automatically adjust to the lighting conditions (photochromatic). This provides ideal visibility in both sunny and cloudy weather conditions. The lens is made of unbreakable ceramic material and provides 100% UV protection. Malleable nose pads as well as temples with a rubberised soft insert ensure the best possible comfort. Meanwhile, a high-quality folding mechanism keeps the strap in its position.