replacement sofa bed mattress

Replacement sofa bed mattress is a tricky thing.  Some sofa beds are not designed for the mattress to be changed, as the seat cushion area is fixed to the frame of the furniture. 

If you have a futon style sofa bed with a seperate mattress then you should have no problems in replacing it.  Speak to your local supplier about the various mattress options, as there are many levels of quality mattress outthere.

For sofa beds with fixed mattress your options are very limited, and the only alternative is to have an upholster inspect the sofa bed and assess if its worth replacing the foam.