Product Description The HALO SleepSack­Swaddle replaces loose blankets in the crib that can cover your baby?s face and interfere with breathing. In addition to helping your baby sleep safer, it helps him sleep better, too. Its adjustable swaddle wrap immobilizes your baby's arms to prevent the "Moro" or startle reflex. And, it is the only 3-way adjustable swaddle that adjusts to your baby?s sleep style. Swaddle arms in, hands-to-face for self-soothing, 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. Used in hospitals nationwide, the Halo SleepSack Swaddle is the #1 choice of hospitals and is recognized as "Hip Healthy" by the International Hip Dysplasia Institute. Its strong adjustable fasteners ensure a perfect fit and resist breakouts for more secure swaddling. Plus, its innovative zipper unzips from the bottom allowing your baby to stay swaddled for easy diaper changes. A portion of each SleepSack Swaddle you purchase will go to support non-profit organizations like First Candle/SIDS Alliance. Made from 100% polyester microfleece fabric, the layers of sleepsack and swaddle provide a TOG rating of 3.0, ideal for chilly seasons and climates and keeping newborns warm and comfortable in any climate. Super-soft micro-fleece fabric is plush inside and out and is designed to wick away moisture. Size Newborn is designed to fit babies weighing between 6 and 12 pounds, who are generally 0 to 3 months old and 19 to 23 inches long. Discontinue swaddling when the baby shows signs of rolling over or breaking out of the swaddle wrap. From the Manufacturer The Halo SleepSack­ Swaddle replaces loose blankets in the crib that can cover your baby's face and interfere with breathing. In addition to helping your baby sleep safer, it helps him sleep better, too. Its adjustable swaddle wrap immobilizes your baby's arms to prevent the "moro" or startle reflex. And, it's the only 2-in-1 adjustable swaddle that allows for swaddling arms in or arms out for baby's comfort and to ensure an easy and gentle transition to the SleepSack wearable blanket when it's time to stop swaddling. Used in hospitals nationwide, the Halo SleepSack Swaddle is the No1 choice of hospitals, recommended by safety organizations and is approved as "Hip Healthy" by the International Hip Dysplasia Institute. A portion of every purchase goes to First Candle/SIDS Alliance and The Canadian Foundation for the Study of Infant Deaths. Use over regular sleepwear to take the place of loose blankets. Discontinue swaddling when the baby shows signs of rolling over or breaking out of the swaddle wrap. 100% polyester micro fleece. Size preemie fits birth - 5pounds, size newborn fits 6-12 pounds, size small fits 13-18 pounds.