Ear fans in the heat while you listen to cool sounds may seem like a good idea but they're noisy and they may tangle up your hair. Small water bottles have been devised with a layer of cloth around that keeps the moisture from evaporating. Insulation that's moist is five times cooler than dry insulation and the moisture doesn't evaporate away heating the earphones too much while also moderating the temperature!
Freezer Burn No More!
