17th and 18th century winter clothing for the common people.
Despite my earlier post on under-waistcoats, and undershirts, further research has found nothing to confirm that there ever was a specific undergarment. However, for those who are looking for more items of clothing to wear for winter, there is good news!
Although there is no proof of specific undergarments such as the under-waistcoat, an extra normal waistcoat can be worn under the normal shirt, or under another waistcoat. The same applies to an extra shirt, which can also be worn under another shirt. There is even documentation of two coats being worn at the same time.
Primary information for the above can be found at the following links: http://archaeologydataservice.ac.uk/catalogue/adsdata/PSAS_2002/pdf/vol_055/55_213_221.pdf