A chest covering to keep a baby warm in cold climates; may have a polo neck and/or hood attached. Can be extended into a babywearing dickey, which is like a blanket that covers baby and babywearer, with head holes for each (possibly with hoods and/or polo necks), going over both the baby's and babywearer's shoudlers. Usually worn with/under a coat that encloses wearer and baby. Named for "dickey" insert which is a fake front on a man's shirt.
A dickey (also spelled "dickie") or "shield" is a garment that resembles the front or collar of a shirt and is worn as a separate piece under a jacket, dress, or in the case of the sailor suit under the middy blouse. The dickie is soimetimes refeered to as a vest. In some cases the dickey was a small piece just covering the "v" of the middy blouse to fill in the neckline. Other alternatives were to actually attach the dickey to the middy blouse. Dickies could be plain or have an embroidered design. There were also stripped dickies. In other cases a kind of "t" shirt was worn under the middy blouse. This was the case for the French-style horizonal stripe shirts that served as dickies.