100% Cotton FABRIC: Made of 3 layers of thermal fabric, 100% cotton, this baby jumper is lightweight, comfortable and breathable to wear. Soft safe and warm, like a mother’s touch. Best care for your baby. WARM: Babys onesies long sleeve and footies help to keep baby warm from arm to toe. BUTTON CLOSURE: Button designed convenient for dressing and changing your baby’s diaper. CUTE: Lovely patterns make your baby more pretty after wearing this long sleeve sleepers. Best gift for infant. Your little will like it. Perfect for sleep and play. Any seasons can wear, winter, summer, fall, spring. Easy to clean and dry. Machine washable, no deformation.