However, as great as these a-few-sizes-should-fit-all solutions are, they never offer quite the level of exclusion you might hope for...That's exactly what the Etymotic Research hf2 Custom earphones offer...The idea is that by using exactly moulded tips, significantly better isolation is provided...

The hf2 headset offers better sound quality—and a more custom fit—than the stock iPhone ’buds...It’s just too bad that they’re all style and little substance...Thankfully, we’re able to survive our daily commute via public transit by the grace of well-crafted playlists and the Etymotic hf2 headset...Like the rest of Etymotic’s line...

I’ve already mentioned Etymotic Research, purveyors of fine canal earphones such as the wireless ety8, and the professional-grade ER.4 - one of my reference listening devices...The hf2 are wired canal earphones similar to the ER.4, but designed primarily for use with the Apple iPhone...While the ety8 are also designed for use with the iPhone, they don’t function as...

"I highly, highly recommend them to any iphone user -- it will change your mp3 player from a toy to a audiophile-worthy piece of gear..."

"Personally I recommend using the foam ear tips because they give the best seal..."

"Those require replacement every few months so I also recommend purchasing a few replacement sets from etymotic..."

"Accurate sound reproduction, Very good in-line mic w/ easy to push control button Microphonics (cable thump) do occur so these are not a good choice for the gym I would be willing to bet that many people have never heard their favorite music accurately..."

"Cord length good for average sized people ( I keep my phone in my inside breast pocket on my jacket or pants pocket with out any problems..."

"Cord quality..."