Shure and Westone both offer great IEMs (in-ear monitors) which have foam tips that block around 30db of external sound, and offer good-to-great representation of the source material.<p><a href="http:&#x2F;&#x2F;www.headphone.com&#x2F;collections&#x2F;in-ear" rel="nofollow">http:&#x2F;&#x2F;www.headphone.com&#x2F;collections&#x2F;in-ear</a>