MATERIAL: 100%Cotton. This baby pajamas is high quality fabrics and well made. The toddler thermal underwear is made of striped fabric, which is more breathable and friendly to the kids’s skin, health. | HOW TO CLEAN IT: It can be machine washed. In order to protect the buttons and zippers, it can be placed in a laundry bag and then placed in the washing machine; it can also be washed by hand. | FIT: footed style keeps your baby’s feet warm and diaper gusset gives extra room for your baby’s diaper. High quality cotton keeps it’s shape without stretching out over time. | PERFECT GIFT: Suit for winter, summer, fall, spring. Great Gift, built-in footies to keep baby warm from head to toe. Designed for daily sleep and play.