There are two basic types of waterbed mattresses on the market and within these two types are three subdivisions based on water movement. The types of waterbed mattresses are:
Hard Side Waterbeds: This type of waterbed is designed to be held together by a wooden frame, hence the name “hard side”. These typically come with a headboard, and these will sometimes include a bookshelf. Hard side waterbeds are built to be a featured piece of bedroom furniture.
Soft Side Waterbeds: This type of waterbed resembles a regular mattress. The outside of a soft side waterbed is made from foam and fabric, which is why “soft side” is used to describe it. Soft side waterbeds are easier to find sheets to fit them since they can use regular sheets.