100% Cotton Imported 2-way zipper:The zippers can zip from top to bottom, and from bottom to top.Easy for put on/off and diaper changes. Incredibly soft 100% cotton jersey fabric with a TOG rating of 0.5 or 1.0??single layer or double layer), offers just the right comfort for moderate seasons or climates. The baggy design also easily fit for wearing pjs under this sleeper. This wearable blanket with feet (opening) is easily for mobility when awake. The roomy crotch sleep sack allows room for kicking but cannot be kicked off. Replaces loose blankets in the crib that cover your boys’ face and interfere with breathing. Different sizes and styles for you to choose,please check the details and differences of the pictures before placing order.