Rather than the resin soaked felt, (A common theatrical costuming method, by the way) I substituted leather for the edges of the yoke and tunic. One source of the leather I used was scraps from the burgundy color leather used to make saddlebags for the Union troops in "Dances With Wolves". The burgundy photographed brown in the movie. Also I would wet mold leather pieces for the spine. I reasoned since the rest of the tunic was leather, why not make the edges and spine out of leather also?