The best king mattresses, whether you're sleeping or working from bed

Upgrading to a king-size mattress can be a good move for a number of reasons. Maybe you sleep with a partner and need some extra space, or maybe you just want more room to sprawl out at night. (No shame in being a bed hog.) You might even, due to necessity or preference, work from bed. If so, a king-size mattress can provide more...