Firstly the waterbed safety liners are a waterproof sheet that sits between the waterbed mattress and the other bed parts. If you own a soft sided waterbed please click on the softside waterbed safety liners. And please click on the traditional waterbed safety liner, if you own a hardsided waterbed.
For soft sided waterbeds we always prefer the flat safety liner over the fitted liner. They are a generous size and can be made to fit any model of soft sided waterbed.
And for the hard sided waterbed we use a thick fitted vinyl safety liner. These are welded at the seams. And offer great protection against any extremely rare problems.