As fast as sound: the Sonic. The sporty focus of the glasses is reflected in all corners and lenses of the glasses. The Sonic QV sits stably on the head. Tight - and yet comfortable. The temple ends are rubberised, the nose wings can be individually adjusted. So the fast goggles won't go flying either when trail running or on steep descents on a mountain bike. The QuattroflexVarioflex lens is pulled far outwards to protect the eyes from draughts. At the same time, the lens enhances contrasts, filters out indirect light rays refracted by clouds, water or ice, and darkens automatically depending on the amount of sunlight.