The Summer Infant SwaddlePod was developed together with leading safe sleep experts. The SwaddlePod is ideal for very young infants even preemies in that it creates a cozy womb like feeling for baby and helps prevent baby from startling awake. Simple and easy to use just zip baby into the pod. The soft comfortable spandex cotton blend stretches with babys movements for comfort. The two-way zipper allows for quick diaper changes. Every baby needs to sleep safe and sound!