1. When the product is taken out of the package, if the temperature is lower than 10℃, do not use brute force to unfold it. Under the condition of keeping the original folded state, add water and heat for 10 minute. Do not expand until the inner tube becomes hot and soft.

2. When using for the first time, inject pure water until the water flows out from the other side.

3. Put the water mattress flat on the bed, so that the mattress does not curl or fold, and the part without the controller is the foot. There are only sheets on the storefront.