A plain sofa is one of those things that looks fine and never quite looks finished. Not bad enough to replace, not good enough to stop noticing. The right throw or duvet set does something a cushion cannot. It changes the whole weight of the piece, makes it look like someone actually thought about it. White is the one we come back to every time. Not because it is safe, but because it works. It reads as clean and considered rather than decorated, and it layers well with whatever else is already in the room. What we have picked here are duvet sets that have the kind of texture and quality that holds up on a sofa, not just in a bedroom. Fabric that drapes rather than bunches. A white that stays white. The kind of thing that makes the rest of the room look more pulled together simply by being there. That is the effect we were looking for.