PRACTICAL FOR EVERYDAY - Ideal for babies who are at the stage of trying or succeeding in standing up in the cot, and easy to put on and durable with frequent washing. OPTIMAL SIZE - There are choices for the size, a smaller size S is suitable for the newborn from 6 to 18 months old, the size M fits the baby from 1 to 2 Yearsold. and the larger size L fits the baby from 2 to 3 Yearsold. COTTON MATERIAL - The baby sleeping bag is made of 100% cotton, the fabric is soft to the skin and 2.5 tog great for the colder nights, ensuring the baby a comfortable sleep. TWO WAY ZIP -- Three zipper, so easy to put on / nappy changes & open feet design, it has open feet as baby is walking and won't fall over, a pair of bedsocks will keep her feet warm.