2-in-1 adjustable swaddle allows for swaddling arms in or arms out ensuring an easy transition to the SleepSack wearable blanket when it is time to stop swaddling 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. Unzips from the bottom allowing baby to stay swaddled for easy diaper changes. Sleeveless design reduces the risk of overheating. Generous sack design allows room for kicking, but cannot be kicked off so baby stays warm all night. Recognized as "Hip Healthy" by the International Hip Dysplasia Institute. "Back is Best" embroidery reminds caregivers to place baby on his or her back