Should I use a sleep sack? What is a baby sleeping bag?
In a word: yes. Putting your baby in a sleep sack – sometimes called a baby sleeping bag – is a great way to ensure that your baby is warm enough without worrying about the safety risk of using blankets. It may also be a good alternative to a swaddle if your baby liked to be wrapped up but has grown out of the swaddle, and can continue to be used throughout toddlerhood. A side benefit that I found with my own children- it delayed the “climbing out of the crib” phase.