Retail Price ¥13,800 This is the standard type of Sleepy Tofu's memory foam pillow. I am selling it because I purchased another pillow. I have only used it a few times, and there are no noticeable stains. The cover is removable, so I will send it to you after washing it. The soft, bouncy feel of the pillow core is a characteristic of urethane foam. This is not an abnormality. The color has turned yellow, but as explained on the company's website below, this is not an abnormality. Company website explanation: Urethane foam (foamed urethane) may oxidize when exposed to air, and yellowing may be noticeable in white colors, but this is a normal physical phenomenon and does not affect use. Size 61cm x 40cm 【Height】9-10cm (center)｜12-14cm (sides) Thank you for looking.