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<p>They make all kinds. The PX-100II model that I have is old-school. It just has thin foam pads that sit lightly on top of the ear. They are held in place by a slight amount of clamp pressure from the metal band over the head and the fact that they weight practically nothing. I’ve never had them slip walking or jogging – on my bare head or over a baseball cap or over a beanie. The thing I like is that when I’m out walking or jogging, I can push them back off my head (and around my neck) to exchange greetings with someone on the trail and then, just as effortlessly, slide them back up into place. To me, the earbuds require too much fiddling.</p>
<p>The only time I’ve ever had them slip is when I’m lying down and moving – such as inverted rows on the Jungle Gym straps, doing turkish getups from the floor, bench pressing with my back on the stability ball, etc. In those cases, I sometimes have to tilt the headband slightly foward, so it’s over my forehead instead of the back of my head. That’s not very often. Otherwise, I wear them for all of my stength workouts with no problem. For example, it’s no problem doing these [TRX</a> pushups](<a href=“http://www.youtube.com/watch?v=vOnU_KSMPX4]TRX”>http://www.youtube.com/watch?v=vOnU_KSMPX4).</p>
<p>The foam pads get sweaty and gross, but these are my exercise headphones, so I really don’t care that much. Replacement pads are available, but, I had not reached the point where it was necessary. I don’t know how they would hold up in a pouring rain.</p>
<p>The one thing this model is not great for is airplane travel. They don’t block out any sound and people sitting close nearby could probably hear a slight bit of tinny music. This particular model is widely viewed among audiophiles as one of the very best sounding portable iPod type headphones.</p>
<p>They make a whole line of Sennheiser/adidas fitness headphones.</p>
<p>[Sennheiser</a> USA - Sport Earbuds - Sport Headphones - Adidas/Sennheiser CX 680i - Running, Workouts, Gym, Fitness - Personal Audio](<a href=“Sennheiser — Headphones, Microphones, Wireless Systems - Sennheiser”>Sennheiser — Headphones, Microphones, Wireless Systems - Sennheiser)</p>
<p>If I had to go with earbuds, I’d go with the in-ear canal types that actually go snuggly into the ear like ear plugs. I’ve had a set of those and they sound pretty good. They are a great choice for noisy environments, as they block a good bit of sound. Probably the best bet for airplane travel – although I’ve gotten to wear I just enjoy the quiet of my earplugs with no music and no noise on planes instead of blasting music over all the din. Here’s the sport iPod version:</p>
<p><a href=“Sennheiser — Headphones, Microphones, Wireless Systems - Sennheiser”>Sennheiser — Headphones, Microphones, Wireless Systems - Sennheiser;