Cyclists are particularly hard in traffic. Again and again there are dangerous accidents and one wonders, why is there for bicycles really no brake light, winker or mirror? The latter problem could have been solved. Rearviz is called this Wearable, which exceptionally without much electronic Schnickschnack manages. In the end, it is a small convex mirror, which can be attached to the arm, thus providing a good overview for fast cyclists as well. Practical and could be a quite meaningful matter.