This was exactly what I wanted.  It is very thin - like a blanket - and we're using it over our winter duvet.  Easy to wash, did not come with a smell like others mentioned but I washed it before use anyway.  
Don't trust the picture for how it will look on your bed; does not come to the floor.  Ours has enough overhang on each side to cover the duvet and comes to the bottom of the mattress.