Hellobee Boards

The first 3 would be my choice, but only after seeing them for quality in real life. LL Bean and Northface make similar style bunting that are legit for cold weather - to be honest, not sure I would trust Target $ to be as warm all over.

I would do a bunting over a jacket/pants so there is no chance of exposed skin and also do bunting with foldover hands.

They won't take them outside if it's below freezing, so I wouldn't aim for a super insulated bunting because I would be worried about the baby overheating waiting while the other babies got bundled up. They also won't be out for long. Any of these full body suits will be fine!

At that age I preferred to put her in a bag-style bunting in the stroller: http://www.target.com/p/just-one-you-made-by-carter-s-baby-boys-carbag-grey-osfa/-/A-50835397?lnk=rec|pdpipadh1|related_prods_vv|pdpipadh1|50835397|1

You kind of need to know if your baby runs hot or cold. Mine always ran hot so a fleece bunting like the first link was perfect. Other posters are suggesting more insulated bunting but mine would have been sweating in those in above-freezing temps. Depends on your baby though. Either way, I'd make sure the one you get is full length (not just a jacket) and easy to get on and off over an outfit. We had one that was almost identical to the first link and it ticked all those boxes.

I have a bunch of the first ones and really like them. If it's not too cold out, it's not too hot. If it's cold out, I go up a size and then put a couple layers underneath.