Ikea foam mattress. The thick cover unzips into halves and is easy to wash (but can't be tumble dried). Recently washed one part and it is like new.
It is the European size 200cm x 90cm x 10cm
No marks on the covers and good firm support.
Ikea mattress (Hurst Golf Course RG41)
This offer has been gifted to someone and is no longer available.