How to wash: better recommend hand washing, or low temperature machine wash. When machine washing, please close sleeping bag zipper well before washing and put it in a washing bag in the machine which can keep the zipper long and not easy to broke. 3-zipper design,just pull the two zippers of the bottom then the baby can pee. Keep warm in the cold winter, when the baby wakes up,foot openings design more convenient for the baby to walk. Perfect for the baby with the height from 75cm to 95cm. Removable sleeves:can be worn as a vest,prevent baby from overheating.