Because the Smartwrap's made from rubber, it doesn't damage your cords in any way. Sumajin doesn't recommend it for other types of cords you may want to organize - such as stereo components - but that seems a natural enough future extension of the brand given how well and easily the Smartwrap works.
There's a vague fashion component to the Smartwraps as well: Sumajin sells nine colors of them (white, clear, black, orange, blue, green, purple, red, and pink) as well as five colors of matching ear foam replacements ($1.00 per pair, red, blue, orange, green, and yellow) to match
We tested a black Smartwrap, which definitely shows off the iPod's white headphone cords, but would probably have preferred white or clear ones.
A bone shaped piece of flexible flat rubber with one diagonal groove on each of its ends, the Smartwrap does only one thing: it manages your headphone cord. You place the Smartwrap someplace in the middle of the cord, wind the cord around Smartwrap's centre, and then lock the cord's two ends in the rubber's grooves. Consequently, your five-foot cord shrinks to two feet and you're no longer left with a ton of dangling wire wherever you walk.