This is a BRAIN SLEEP pillow, known to conform to the shape of your head with use. I received it as a gift, and I tried it with a towel, but my current pillow suits me better. I haven't used it much, but it has been opened, so I'm listing it as a nearly new item. The retail price is 33,000 yen, so it's recommended for those who are interested. - Brand: BRAIN SLEEP - Washing Instructions: Machine washable - Material: Special foam