Snugg

The baby sack can be found in bottoms and also fits over most tops. There are two versions (you can have both in game, V1 is pink, V2 is blue):
This version has assigned leg bones, so it moves with the legs which looks odd in poses, but less odd for gameplay.
This version has no leg assignments, this means it works well for poses, but looks slightly odd in gameplay!
Version 1     Version 2