1.Polyester,Cotton 2.ACCOMPANY YOUR TO GROW - Available in three sizes: 1-3T for size S; 3-5T for size M; 5-6T for size L. pays great attention to the growth and of your so we are giving you this sleeping bag will fit your well with room to grow. Further more it helps them fall asleep and also allow to move easily when they awake because of the design of opening feet. 3.EXCELLENT QUALITY YOUR FOR SWEETY - Made of high-grade polyester material and filling with cotton lining so this sleeping bag is comfortable, warm and breathable, of any harmful chemicals, they will provide a and cozy sleep for you in a cold winter. 4.CONVENIENCE & SAFTY - Long sleeves desigh not only keeps your warm but also makes it like a jumpsuit, it is very convenient to wear no matter at home or outside, and we recommended to wear at a temperature of 55-77℉. Easy to take off or put on for toddlers with the flexible zipper which is greatly increase comfort and . 5.UNIQUE CARTOON DESIGH&WASHABLE - We have 5 animal styles for you to choose,only these lovely design are worthy of your little precious.Not only has lovely appearance but also easy to wash,crafted from top priority fabric, will soft getsser with every washing, it's perfect for 's sensitive skin, help your back to sleep.