This is a vintage women's thermal shirt made by Allan-A in a size small.
The shirt is blue and features a round neck, long sleeves, and a straight bottom hemline. There is no material information on the tag.
It measures approximately 16.5" from underarm to underarm, 18.5" from top of shoulder to sleeve opening, and 20.75" from the back of neck to bottom hemline when laid flat.
This shirt comes in good pre-owned condition with a few snags in the fabric and some light pilling.