I'm intrigued about the wind bag concept too - we are not the Arctic north by any means, but there's enough went and windy weather arouhnd here in the PNW even in the summer that I sometimes long for a better shelter than a jury-rigged tarp. Bork^3, do folks pack these botty bags and deploy them only in emergencies, or do they also put them out during breaks in hiking etc? Would you use such a bag for overnight camping, or is there inadequate air circulation for that (except in an emergency?)