This baby bag can be used as a diaper backpack, a changing station, or a baby crib, or it can be connected to a stroller with a buckle on the shoulder strap. It is made of waterproof material, it's a strong structure & durable. Also has a USB charging port, you can place your power bank into the inside pocket in the main compartment. Price drops from $59.99 to $35.99 w/ free shipping.