100% Cotton Inner Lining, Polyester outer Shell and Filling HIGH QUALITY: This is a very warm 2.5 Tog Winter Model baby sleeping bag for room temperatures below 70 F. Minky Dot outer shell and 100% Jersey cotton inner lining. High quality YKK snaps and zippers. Please follow our sizing chart. The large size fit your toddler 22 months old through 3T SAFE SLEEP: Baby sleeping bags should be sleeveless to aid the heat loss and air circulation. Babies sleeping under traditional blankets rarely sleep with their arms inside. Sleeveless design reduces the risk of overheating. Your baby is covered and warm all night. No more kicked off covers means your baby sleeps more comfortably. Adjustable armholes.