There is no question that the listening experience when wearing the Aftershokz Aeropex for the first time is quite spectacular. The sound is indeed “in your head” and this despite the fact that you can still hear the outside world unchanged and, due to the extremely robust and slim design, you don’t feel like you have anything in or on your ears at all. The richness of sound that travels through the bones into the ear, however, is rather limited to the mid-range and cannot compete with classic over-ear or in-ear designs in terms of loudness and frequency response. Speech, on the other hand, such as in podcasts, audiobooks, or telephone calls, is transmitted quite well by these earphones. In combination with the extraordinary feeling of freedom of the ears and the good speech quality, the Aeropex is recommended as an excellent lightweight headset for makers of frequent calls.