Yes. After you carefully cut open the packaging, save the plastic in a safe place until you know that the mattress is the right one for you.
If you need to return the mattress, slide it into the plastic packaging it arrived in. The mattress will fit inside even once it has expanded. All of our mattress returns must be wrapped in plastic on the day of return pickup.
Already threw away the plastic? You can buy an inexpensive plastic mattress bag online or from a hardware store or moving van rental agency. Plastic sheeting for painting also works well.
There is no need to keep the cardboard box beyond the delivery date. It can be recycled or repurposed.