How about Wan Yu mattress?

Not bad. Wanbao mattress can produce piezoelectric effect, thermoelectric effect and far infrared effect after contacting with human body, which can promote the recovery of balance and smoothness of human meridian circulation system and produce negative ions. Stimulating parasympathetic nerve by negative ions can regulate people's autonomic nerve, improve sleep quality, and quickly eliminate symptoms such as tension, fatigue, headache, insomnia, constipation, irritability and backache. Wan Yu mattresses need regular cleaning and maintenance. When choosing a Wan Yu mattress, you need to make a reasonable choice according to your own needs and budget.