Thanks for the sweet comments. These are made with one of the newest sewing supply here in Japan which is getting very popular. THe interlining is made of polyester. You can shrink it into 30% less in size when you heat it into boiling point, just bringing the iron/steam closer to the work, not pressing, or heat it with hair dryer. I needed a pair of looong chop stick to heat them with hair dryer since it was too hot to hold.LOL