Very early on we figured out that one of the girls sleeps better when being held. Obviously, this wasn't practical so I looked into options help her feel secure enough to sleep on her own. Enter the Nested Bean Zen Sack Classic, a lightly weighted sleep sack. It has a weighted spot on the chest, helping comfort babies who need to feel embraced. It is also reversible for babies who are tummy sleepers.
Night one, she became little miss independent. And she has slept in it nearly every night since. AND, it's a puffin print!
I grabbed ours on Amazon, but you can buy directly from Nested Bean for slightly less and often with a coupon code (the Puffin Party pattern was only available through Amazon when I purchased it).
It is also a good way to transition from swaddle blankets to pajamas.