I have bought so many different kind of pillows, the"横楽寝シリーズ" included. But "アーチピローDUAL" is the most comfortable pillows I've ever used!!! It gives me a completely different sleep experience.
Although it is expensive to send it to Taiwan by EMS of 転送コム. (5930円!) I still think IT IS WORTH TO HAVE IT !
ps. I think if the arm part can use ナチュラルパイプ will make this pillow better.