Sennheiser is a well-known and respected brand for audio equipment and you can find everything from speakers to headphones coming from the brand. In fact, right now Sennheiser has a pair of its in-ear headphones on sale over at Amazon right now. The CX 3.00 are going for just $20.97 which is down from their original price of $54.95, which is more than half off and a steal if you're looking for a really good pair of headphones that won't break the bank.
These headphones come with an 18 ohm impedance which should help give the headphones some decent sound quality and a bit of a boost. The headphones also come with different sizes for the eartip adapters. Everyone's ear sizes can be a little bit different, and there will be four different sizes to choose from so you can find the ones that fit you the best.
The wire is tangle-free and it's 1.2 m long so you should have plenty of room to stretch out if you want to use these while your phone is on the other side of the couch or the bed. The entire package comes in a nice little carrying case for convenient storage, so if you plan on taking these with you while you travel you'll have a nice place to keep them when not in use, though because of the tangle-free wire you could probably just toss them in a bag pocket too and be just fine.