Thank you for viewing. Brain Sleep Portable, I have two, so I'm also listing this one. I actually tried sleeping with this at night, but it didn't really suit me. I only slept for about 10 minutes. (I used a thick pillow cover, so I didn't touch it directly) After that, I stored it in a suitcase in a paper bag. When I held it up to the sunlight, I noticed a shadow that looks like a round stain on the back. It's only noticeable in bright light. I haven't spilled anything, and it's a perfect circle, so I think it might have been there from the beginning. Please be aware of this. I tried this one more than the other one, and I threw away the bag and band, so I'm listing it for a slightly lower price. I will ship it in the square shape shown in the fourth photo. I don't use a neck pillow on airplanes, but it can be shaped in various ways, so it seems useful on airplanes as well as in hotels at your travel destination. Shipping will be on December 28th. Please be aware of this. Thank you.