The SE315 blocks ambient noise with its custom fit Sound Isolating Sleeves. The buds fit comfortably in the user’s ear, blocking outside noise and providing for a crisper and clearer listening experience. This feature makes the SE315 truly high quality, isolating sound during live performances, helping to lessen distortion on plane rides, blocking out distant chatter in public, and eliminating background noises at the office. This Sound Isolating Design helps users to better hear the top quality that is expected from an industry leader in audio excellence. The ultra-slim design and behind-the-ear style of the SE315 also makes the model ideal for musicians, as it is subtle and out of sight.