
When choosing a waterbed, you must also decide on which type of motion or you are looking for.
The waterbed mattress motion is basically categorized into three sections. The waveless waterbed mattress, the semi waveless waterbed mattress and the motion control mattress. Fibers are what is used inside the mattress to determine the amount of motion.

The semi waveless waterbed is between 90-95% motionless. There is not a very big difference with this and the waveless waterbed mattress. However, other people in the bed might have a small amount of motion or disturbance.
The semi waveless waterbed is anything under 85%. These mattresses are soft and have Soft with excessive amounts of motion. Most people when they enter this mattress will sink to the bottom. It is also causes the most disturbances.