Lack of elemental moisture protection. A rather short wire to the headphones themselves - pulls a little down by the ears. The air intake holes for the speakers are not located behind the earphone, as, for example, on the wired tune 250 model, which is similar in shape and sound to the earpiece, but exactly on the side, due to which, with any movement, wind, and, especially, cycling, the sound is almost completely muffled by the oncoming air flow even at maximum volume (which is also unsafe for hearing). Moreover, it is not at all clear what structural reason this is justified - on a wired model with the same headphone shape, these holes are located behind the headphone case, covered with a mesh, and this problem is completely absent. There is no second noise reduction microphone - the interlocutor, during a conversation, hears everything that happens around, which greatly reduces the possibility of a comfortable dialogue. The shape of the headphones is strange, it doesn’t seem to differ much from the wired tune 250 / earpods, but it keeps and isolates much worse in the ears.