... high-tech, energy saving, environment-friendly water mattress for a good sleep Four features 1. Sleep cool and warm ... get heating or cooling, what’s more can keep a constant temperature, make human body have more healthy sleep ... eczema on the back of people who lie a long time on beds or who can not self-care patients, and ... , energy saving, environment-friendly water mattress for a good sleep 0.8*1.6m