Hard-sided waterbeds use traditional design where a bladder (water filled chamber) is placed inside of the wooden frame, which sits on the top of specially designed platform with wooded deck to evenly spread the weight. The wooden frame can be decorative and can blend in with other furniture. Hard-sided waterbeds are more difficult to get in or out of. These waterbeds generally use less padding on the top of the bladder and some models use none to provide unique, floating feel. In any case, ability to control the temperature with this design becomes crucial.