I am planning on making the School Days coat with an interlining this fall, but am not sure what to use for the interlining. Has anyone made this coat using a cotton flannel interlining? If you used Thinsulate, did you find it too bulky or warm? I live in the Northeast and bought coating weight wool for the outerlayer, and am planning on using cotton quilting fabric for the lining. I'd like my child to be able to wear the coat on chillier fall days and average winter days. He has a warm ski jacket for really, really cold days. I saw some older posts here that talked about using Thinsulate, but didn't see anything about other types of interlining. While searching online for ideas, I found this conversation on another website, and am now worried that Thinsulate may be too warm or bulky. http://sewing.patternreview.com/cgi-bin/sewingclasses/board.pl?t=32897