Thank you for viewing. This is a baby carrier from the Japanese brand, napnap. I purchased this after the birth of my second child because I needed to carry the baby on my back from an early stage. The good points are that the main body is light, the process of carrying the baby on the back is easy (fastening buckles, carrying it like a backpack), and it becomes compact. It takes a little getting used to when folding it up, but once you get used to it, it's very compact and convenient. No pets, no smoking. ■Product Details • Brand: napnap • Color: Black [Vertical Carry] 4 months after neck is stable ~ 24 months (approx. 13kg) [Back Carry] 4 months after neck is stable ~ 48 months (approx. 20kg) *36 months - 48 months are not covered by the SG mark system. Please purchase this item if you understand that it is a used item.