Extraordinary comfort, just amaizng. I bought the X-large, which ends up matching the width of my sleeping bags. The mattress comes in a heavy duty clear vinyl bag, but it\'s difficult to get in in and out of the bag and the bag has no handles, so it\'s really only good for storage. If you\'re going to hike around with this, you probably want the accessory bag. This doesn\'t feel at all like an air mattress; it has a plushy feel to it and is just the right thickness when placed on a firm surface. I hesitated to make the original purchase, seemed a bit pricey, but in the end it\'s so comfortable, well made and therefore a terrific value.