Each Aden and Anais Swaddling Blanket set includes 4 large unique cotton muslin wraps 47" x 47" *Why Swaddle Blankets? 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 blankets keeps your baby's face uncovered * Swaddling prevents your baby moving around the crib and getting into dangerous or uncomfortable positions *Washing Instructions: These delicate cotton of the Pastel Pink Traditional Muslin Swaddling Blankets are light, yet extremely durable, and can be machine washed and tumble-dried. Best of all, the more you wash aden + anais muslin wraps, the softer they get, as the air from drying creates a unique waffled effect in the fabric. *Be sure to wash the Pastel Pink Traditional Muslin Swaddling Blankets (4-Pack) before your first use!