K.M.
L.,
We used the Halo Sleep Sack with our baby girl. We transitioned her from swaddling to the sack and it worked beautufully. She had one cotton one and one fleece type one for when it was really cold. This was always her cue for night time, and she always slept so well in it...aaahhh for the days of sleeping well, she is now 1 year old and wakes more now than she ever did....of course that is another story. Best of luck to you, I think you will really like it. You can get them at right start, and various other places.
K.