The LOLLO SleepSack Swaddle made of 100% cotton. It replaces loose blankets in the crib that can cover your baby's face and interfere with breathing. It has 3-way adjustable swaddle that adjusts to your baby's sleep style. Swaddle arms in, hands-to-face, one or both arms out to ensure baby's best sleep and an easy and gentle transition to the SleepSack wearable blanket when it is time to stop swaddling. Love LOLLO, Love your baby.