Use IKEA king size mattress pad (Newbold S41)

Can anyone make use of this old foam Ikea mattress pad? Seems a shame to dump it if it can be repurposed for something.

It is to fit a European size king size bed - 155cm wide, 200cm long, 7cm thick.

It is several years old, from a smoke free home, always used with a mattress protector. The discolouration is mainly age-related, you can see sideways marks from where it touched the wooden bed slats when we used it under a mattress to raise the height. There are also a couple of marks as shown.

The cover isn’t removable but I think the pad could easily be washed if you have space outside to do it.

Collection from Newbold,S41.