Our covers for the Friheten fit easily over the sofa's existing, non-removable IKEA cover and they are machine washable. When the slipcover is on the sofa, you can still use the storage unit and bed function. This slipcover will not fit the Fågelbo or Månstad model. If your sofa has 5 back and side cushions and it was purchased between 2004-2008, then you have the Fågelbo model.