I am a bit late posting about this but better late than never. This is the polar fleece/flannel sleep sack that I made for Baby S a few weeks ago. All of a sudden the temperature dropped and the girls rooms have been freezing, even with the heat on! Baby S is at that thrashing and rolling around in her crib stage, with no regard for warmth (until it is too late) so I figured that she needed something that would roll around with her.
She loves it and so do I. I made the shoulder straps attachable with Velcro to make it easier to get her out, and I'm so glad that I did. It is so soft and snuggly and I'm thinking about making one for myself (well, maybe just a flannel lined polar fleece blanket for the bed).