You'll rediscover your music

This helmet fits comfortably in the ear, it is discreet and easy to set.
Then it isolates external noise - not completely, but significantly mutes. This allows to rediscover your songs. I found bass lines, guitars, on pieces streamed years. The sound is as introduced directly into your ear. If you like classical music this headset is compulsory - otherwise you lose too much relief with normal headphones (except wholesale high range helmets of course). For Hendrix also is a glare.
Only problem: the first time I tried it, I forgot to get off at the right metro station so I was in!