Swaddling is the ancient practice of snugly wrapping your baby in a thin blanket or sheet, to help her feel safe and secure. Many cultures have used swaddling for centuries, as a way of helping babies feel more settled, and as a method to help them sleep.
A sleep sack is like a mini sleeping bag for your baby and toddler. Sometimes also called a wearable blanket, a sleep sack is another alternative for keeping your little one warm without using loose blankets in the crib.