Can be used regardless of washing or heating functions. Shipping will be done via Yu-Packet Post with the cardboard backing removed. If you need the cardboard backing, it will be shipped via Mercari delivery, cash on delivery, as the size will be larger. Please contact me before purchasing. If you purchase without contacting me, the cardboard backing will be removed for shipping. No price reduction. *There is a small stain near the upper left. It will probably come off in the wash.