This age old technique is used to make your baby feel safe and secure:

Swaddling helps to make your baby feel secure and comfortable as it is designed to imitate the security of the enclosed surroundings they experienced in the womb

Swaddling helps your baby sleep on their back, the pediatrician recommended sleeping position

Swaddling helps your baby stay asleep by reducing sudden arm and leg movements (startle reflexes)

Swaddling keeps your baby's face uncovered

Swaddling prevents your baby moving around the crib and getting into dangerous or uncomfortable positions

Swaddling helps prevent over stimulation

Swaddling can help with breastfeeding, as it prevents babies moving around.

Swaddling using aden & anais muslin swaddling blankets helps keep babies warm (without overheating)
Studies are showing that swaddling babies may reduce SIDS (Sudden Infant Death Syndrome) mainly because swaddled babies sleep better parents are more likely to place baby to sleep on their backs rather than on their fronts, swaddled babies are less likely to roll over in cribs, and swaddling keeps baby's face uncovered