Bladder Waterbed - with Reversible Visco Memory Foam Buckle Top Durable and Long-lasting. Only high gauge, top grade virgin vinyl material is used in the construction of this tube waterbed. Furthermore, all corner seams - the points of greatest pressure - are reinforced. 98% Motionless / Waveless. This top-end waterbed features our F5.5 Waterbladder that contains the maximum layers of fibre as well as a lumbar section. This effectively gives you the benefits of sleeping on water, while virtually eliminating any feeling of water movement. Adjustable Firmness. The firmess or softness of the bed can be better customized by filling the bladder with more or less liquid. Customizable for Summer and Winter. The "Buckle" pillowtop is quilted on both sides and can be reversed depending on how warm or cool you want your bed to feel. One side of the pillowtop is covered with a warm knit fabric quilted with wool. The other side is stitched with a smooth high quality damask and quilted with silk. There's a reason why this fantastic waterbed is called the Seasons! Memory Foam PillowTop: Relieves Back Pain. The "Buckle" pillowtop contains pressure-relieving Memory Foam of 5lb Density. This revolutionary foam - originally formulated by NASA - reduces pressure points and conforms to the shape of your body: Great for anyone who's ever suffered from back or hip pain. Superior Edge Support. 1.8 lbs density sloped wall foam rails maximize side support against the pressure of the water bladder, preventing the bed from bowing out. In addition, high strength stitch bond fabric connecting the rails holds the bed components firmly together from head to toe. Superior Base Support. This waterbed sits on an 8" Waterfall Foundation that is especially reinforced and designed for the Savannah. Premium Split foundations are stadard on all Queen and King beds.