All of our Simba mattresses come rolled and vacuum packed for your convenience.By arriving in a box, you can easily transport your new Simba mattress up the stairs and into your room of choice.Once unrolled, your Simba mattress will be ready to sleep on within three to six hours, but after 72 hours it’ll be at the perfect inflation level. You’ll feel the benefits of your new Simba mattress as soon as it’s unrolled, so don’t worry about having to wait days for it to be ready to sleep on.