Has been struggled lately to find an in-ear monitor for out door use.. Primarily because i cannot seem to find reviews in terms of ambient noise blocking mics.. For example plantronic makes very good conference blue-tooth headphones, but their auido equality is not tolerable for every-day...

I currently own two pairs of RS220, both of them has power disconnection issue (unusable), the Senheisser Canada offers me either replacement of RS220 or RS185.   RS220 has some signal cut off issue, but the sound quality wise is the best I can hope for. There aren't much review about RS185...