Must have for new parents! After using several types of swaddles, this swaddle is hands down the best. Baby sleeps soundly with arms up in preferred position. I thought my baby would have a hard time adjusting to these swaddles because she doesn’t like her hands constricted in the traditional swaddles, but as soon as I put it on her, she was out like a light and slept a long time without waking herself up. They are a bit pricy, but well worth it. They are stretchy, soft, lightweight and keep her warm. Highly recommend using from newborn days and beyond!