King-size Memory Foam Mattress

Memory Foam Mattress
How to store a memory foam mattress pad?

We recently bought a 3" memory foam mattress pad for our sofa bed to make it more comfortable for guests. Does anybody have any idea on how we can store this mattress pad during the day when it's not being used?

If you are tight on storage space store it under a bed in-between mattress and box spring
If not then just roll it up and put something around it. string, bungy cord, strap