It is said that Zhengyang summer sleeping mat is safe. Features of Wendao Zhengyang mat products: double balls in one, double energy, loess tourmaline balls in one, which can release more trace elements beneficial to human health after heating and have stronger permeability; Precise temperature control, the scale is adjusted from 1 degree to 0.5 degree; One-key conversion between wet compress and hot compress. Adopt pure cotton fabric, environmental protection and health, adopt 24 volt DC power supply, and conduct heat by far infrared rays. Is keeping healthy a verb or a noun? It originally refers to a medical activity to maintain life, enhance physical fitness and prevent diseases through various methods, thus prolonging life. Raise, that is, the meaning of nursed back to health, maintenance and tonic; Life means living, surviving and growing. In the modern sense, "health preservation" refers to actively maintaining physical and mental health according to the laws of human life process.