This is a multi-functional diaper bag backpack. It has a large capacity design and can store various diapers and baby supplies. The material is waterproof, and there is a pouch inside for holding insulated bottles, which can keep baby's drinks at a constant temperature. It also comes with a USB charging port, allowing you to charge devices such as smartphones while on the go. The size is approximately 40cm (15.75 inches) in height, 28cm (11.02 inches) in width, and 18cm (7.09 inches) in depth, making it easy to carry. It is a convenient item for mothers when going out. Thank you for viewing.