Used for half a month! The item shows minimal signs of use, but please understand that it is a used item. Size is S, suitable for newborns who weighed 2,900g at birth. [From the sales site] ↓ Swaddle Winter Autumn Winter Sleeping Bag Baby Sleep Well Deep Sleep Wearable Swaddle Zipper Baby Swaddle Preparation for childbirth Sleep Well Winter Newborn Moro Reflex Night crying Putting to sleep All year round Baby Discharge Cotton 100% Cotton Boys Girls Baby Shower - Babies feel secure in the "hands up" pose. This "wearable swaddle" allows them to maintain this pose, providing a sense of security similar to being in the mother's womb. - Suppresses the Moro reflex, which causes involuntary body movements, allowing for a good night's sleep! - The wide hem provides ample space and does not constrict the hip joints, allowing the baby to spend time comfortably. - The zipper can be opened and closed from top to bottom, allowing for diaper changes while the swaddle is still on. - Made of 100% cotton with excellent breathability and absorbency, it feels good on the skin and is gentle on the baby's skin!