Look inside your helmet and you’ll probably see a ‘CE’ sticker. This means it has passed the European EN 1078 standard and complies with a series of test conditions.
However, the European standard doesn’t include a specific rotational impact test. To address, or exploit this - depending, on your point of view - over the last decade we’ve seen the emergence of add-on protection technologies designed to reduce the risk of brain injury caused by sudden rotation in a collision.
