100 Organic Cotton Outer Ultra Soft and Cozy Handfeel outer with a soft polyester fillingPerfect for Autumn and Winter useGenerous sack design allows room for kicking but cannot be kicked off so baby stays warm all night 25 TOG Winter Sleep SackThis is a very warm 25 Tog Winter Model baby sleep sack for room temperatures below 70 FThe recommended nursery temperatures should be between 58F to 69F A Baby Sleep sack surrounds the baby providing insulation from both below and above and also a warm pocket of air around the baby SleevelessBaby sleep sack 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 SMOOTH 2WAY ZIPPER Unzips from the Top which makes it easy to place baby in sack Unzips from the Bottom which makes it convenient for diaper changing With zipper protectors on the back and at the end protects baby from scratches SIZES AVAILABLES06Months1018lbs M612 Months1624lbs L 1218 Months2228lbs XL 1824 Months2636lbs Machine wash with like colorsTumble dry at low temperatures30C 86F