Love your old timber frame waterbed? and want the comfort of a soft sider the have a look at this? Featuring a special soft sider insert that has a standard size waterbed bladder. This mattress insert is longer than standard as there is a difference between the longer timber frame and less wide so you can make the bed easier and higher so you can take advantage of the soft sider features. Gone are the times when you needed to jam a standard soft sider into a timber frame with gaps top and bottom!"