I'm a FTM with an 11 week old son. We discovered a month or so ago that when we use the micro-fleece Sleep Sack Swaddle at night he sleeps amazing - almost always at least 5 hours. However, he is really long and starting to outgrow it. It's also hard to swaddle him with receiving blankets anymore for this reason. We only swaddle him at night, it's become part of our night time routine.
So, I have a couple of questions. When should we start transitioning to having his arms out? The next size up for Sleep Sacks that we have are not micro-fleece, nor do they have the swaddle. So, I feel like that will be a big change. Should I try to budget in a sack like the one we use in the next size up? Or wait and see how he does with arms out? I'd love to hear what others have done.