Yuan is for size comparison. I used it once and it is convenient. Delivery is also fast and satisfactory.
I hesitated much to buy. I have to use it for a long time. I have not slept yet, but I'm looking forward to it.
Iris Airy 3-speed mattress single / mattress to increase sleep satisfaction / IRIS Airy MARS-S / Japans most popular mattress / voucher included free shipping