Sleeping Bag(gage)?

Fed up with the lack of blankets on airplanes operated by cash-strapped airlines? Tired of adjusting the napkin-size blankets that are only sometimes made available? Poshair has the solution to your comfort problem--the airplane sleeping bag. More like a sack, it's composed primarily of polyester and, according to Poshair's promotional materials, will make you the envy of fellow passengers. Whether it will be popular with airlines and transportation safety officials, who might question the ease with which a cocooned passenger could escape a burning aircraft, remains unanswered. I don't know about you, but rarely am I consistently hot or cold aboard an airplane. Typically, I waver back and forth, making a zip-up mummy bag a tad cumbersome. That said, if it's cozy and makes a cramped seat slightly more comfy, I'd give it a try.