If you're looking for noise-isolating earbuds, the Bose TriPort In-Ear Headphones ($99) are not for you. Although they have silicone tips that protrude slightly into your ear canal, they are not meant to protect your ears from screaming children on airplanes--nor from the drone of the engine. They provide far better bass than your MP3 player's stock headphones, but the overall sound isn't a match for similarly priced in-ear 'phones. If you have a tough time sticking things deep into your ear canal or are paranoid about walking around without hearing much of what's going on around you, these are worth a listen, despite some physical design flaws.
The Bose TriPort In-Ear Headphones have an unusual if not unique design. They resemble the earbuds that come with the Samsung Yepp YP-K5; they look like regular earbuds but with silicone tips that funnel the sound directly into your ear canals. The symmetrical cables have an antitangle slider and terminate in a 3.55mm gold-plated straight plug. The plastic plug housing is oddly bulky and rectangular--seemingly just so the company could fit its logo on it.