USE 100% ORGANIC COTTON. Made of 100% Organic Cotton, Zero pollution,2 Layers of Muslin Cotton,0.5TOG.Completely close to the baby's skin, soft, lightweight,wear-resisting, absorb sweat and breathable in summer, gets softer with every washing. Safe and healthy, no pollution, no skin stimulation, not easy to have an allergy. WHY DO YOU CHOOSE TADO MUSLIN? 1.Easy To Use: Easy to wear, Easy to Change Diapers. The design of the legs is perfect for toddlers. The baby can learn to walk faster. 2.Perfect Size: We have four sizes: 60# Clothes Length 60cm, For 0-12 Months Baby. 70# Clothes Length 70cm, For 1-2T Toddler. 80# Clothes Length 80cm, For 2-4 Years Kids. 90# Clothes Length 90cm, For 3.5-5.5 Years Big Kids. 3.Replace Traditional Blanket: No additional covers are required when you use our sleeping bag. Our sleeping bags eliminate the problem of your baby kicking off their covers. Prolonging sleep time, constant temperature overnight. 4.Double Ways Zipper(YKK) With Safety Tab: The design of a two-way zipper makes diaper change easier. The unique inner lining design prevents the zipper from squeezing into the baby's skin during the operation of the zipper. Unique Multi-Button Design In Crotch: You can quietly change the baby's diaper while the baby is sleeping without disturbing his sleep. 5.Special Legs Design: Separate leg design allows room for kicking but cannot be kicked off. So your baby stays warm all night. When your little one is awake, our sleeping bag can provide greater mobility for your baby. This design will allow babies to learn to walk more safely.HOW TO CARE COTTON MUSLIN? Dry at low temperature. Hand washes recommended. Wash with warm water below 30?. Don't bleach. Don?t dry clean. GOTS Certificate Registration No.1001667.