How to Interline a Winter Coat with Thinsulate

Thinsulate is a spun polyester fabric manufactured by 3M. It adds warmth to a coat without adding a lot of bulk. I used Thinsulate recently to add an interlining when sewing the Clare Coat for my daughter. She wanted a warm winter coat to handle the blowing winds of New York City, and an interlining, particularly one made out of thinsulate, is a great way to provide that added warmth.

An Interlining is an additional layer of fabric sewn to the lining of the coat to add warmth. The interlining may be flannel, wool, fleece or thinsulate. This blog post and video explains how to add a Thinsulate interlining to a winter coat.