IONDOCTOR, highly praised by Minami Tanaka! I've used it several times, and there are no noticeable stains. I haven't washed it because I heard that washing it degrades its properties, but I've been using it over my clothes, so it hasn't touched my skin directly. Please refrain from purchasing if you are overly concerned about cleanliness. [The following is quoted from the official page] Loose fit warms the abdomen. A non-constricting belly band. It feels light and fluffy, promoting blood circulation and boosting metabolism. Please use it during relaxation time at home or while sleeping. It cares for coldness and fatigue even while you sleep. It also protects your abdomen from air conditioning at night in the summer. Warming your internal organs also leads to an increase in body temperature, which is helpful for daily health management. It is also ideal for those with lower back pain, menstrual pain, constipation, poor gastrointestinal function, obesity, and pregnant women.