comments:
I mean, in what environment will you be napping? How portable/convenient does it need to be? Something like this is pretty affordable, not too bulky, but it will be loud to fill and deflate. They're pretty quick, though. Without noise being an issue it's a good option. Can also use yoga/pilates/exercize mats. Some are thin, but some are thick and cushy enough for a nap. I have a great foam one that smooshes down flat. Pilates mats are thicker than yoga. You can also find thicker, heavier exercise foam mats that will fold over on themselves and tuck away. They might be more comfortable but less convenient to carry with you if you need to transport it daily. And if you really have some kind of nice office space where you can keep a piece of portable-but-not-pocket-sized equipment, folding cots are available in pretty discreet sizes. Usually sold as camping equipment. On that note, camping bedrolls. Another option, traditional rolling futon/tatami. Hope you find something that works for you. :)