I don't know if it's the product hotels use to wash their linen, if it's is that they use feather pillows, or that they simply never air their blankets under the sun (most likely) but DS most often than not, spends the night awake with asmathic cough. And because carrying his own pillow, and bedding is not only fiddlesome but seems not to be totally effective I was considering buying a Dreambag. Question is... do they work? are they worth the expense?