For mattresses or larger items like furniture, no need to keep the box! We use large industrial machines to compress and pack our mattresses, so they won't go back into their original package. If you don't want to throw the box away, it also makes an excellent rocket ship, side table, standing desk, or playhouse. Any box will do for a return for all of our other products. But if you have the space, feel free to hold onto it, as it might be the easiest way to get your products back to us. To initiate a return, you can visit our return center or contact our Customer Experience team by calling 1-888-828-5448.