Most things I bring mountaineering - especially - most especially electronics are tethered in some ways. It may be too risky to buy an iPhone just to try this out, and I'm doubting anyone's gonna let me borrow a phone and a pair of these. regular earbuds are inexpensive, and if you lose/break them, it's not the end of the world. Airbuds are... $150. For something that can be easily lost.. yikes.