The original World’s Biggest Comforter is here to keep you cozy all night long as you rest comfortably on any mattress. Super soft cotton fabric surrounds a luxury down alternative fill material and has been designed for year-round use. Stop worrying about having enough of a good thing and layer this best-selling comforter on your bed. The biggest, coziest comforter ever created. Our best-selling comforter is 10’ x 10’ and designed to hang over any size mattress and help prevent nightly arguments over the covers (We call it the 'relationship saver').