I am interested in a Simmons Beautyrest Cairo Super Pillow Top mattress.  I am replacing a waterbed, and really like the bedframe that came with the waterbed.  My question is will the Cairo Super Pillow Top fit in the frame, which has sides, and can it be purchased without the foundation?

Hi Diane,

Most of the time when a customer wants to purchase a mattress to be used in conjunction with an existing waterbed frame the dimensions are 72 inches wide by 84 inches long, which equates to a California King size. I would suggest taking a measurement of the inside dimensions to make sure this is going to work for you. We would be happy to sell a mattress without the purchase of a boxspring, just give our sales department a call to request a price quote. You can reach us by dialing 1-800-455-1052.