i saw this the other day while checking out some stuff in new zealand [not hobby related] and thought "now, that's some serious shit!!"
it's no longer available, but this could be a real funky sensory deprivation device, even if it looks goofy.
http://www.grabonestore.co.nz/wearab...t=summit.co.nz
here are a few other links for "wearable head nap pillow"
http://www.ecouterre.com/need-a-powe...ch-pillow-bag/
http://www.gizmag.com/ostrich-pillow-returns/24181/
"did you know that power napping increases productivity by 34%?"