First, mattress in a box needs to be vacuum compressed and rolled, which requires higher quality sponges, springs and other materials. Second, compressing and rolling a large mattress into a small box saves storage space in the warehouse. Third, a mattress usually requires two people to carry it to the customer's home, but most sizes of box mattresses only require one person, especially cartons with wheels, which are very convenient. Finally, due to the reduction in transportation volume, box mattresses greatly save transportation costs compared to traditional packaging.