The basic construction of soft-sided waterbed is identical and it has the same features. The main difference is the foam walls that surround the bladder instead of wooden boards. High-density foam encasement provides enough support and durability and makes it easier to move in and out of the mattress. Soft-sided waterbed design uses similar construction of the upper, comfort layers that provide cushioning and additional pressure relief. The top cover of the soft-sided waterbed may be removable, which is a great feature providing hygienic sleeping surface.