Our Boori Bedside Bed Pocket Spring Mattress is made to provide young children and toddlers with the best support possible. To provide the most comfort, each pocket spring operates independently, responding only to the pressure placed on the spot. The mattresses are compressed and rolled before they leave the manufacturer and have an outer covering made entirely of polyester, which makes them easier to store and more environmentally friendly to transport. Before you can use the mattress, it will need some time to expand and flatten.