Fabric used as a backing for the shell of a garment to add structure and/or aid in shaping. It is also sometimes used to make a transparent fabric opaque. Underlinings are cut to the size and shape of each garment piece and the two are basted together and treated as one during construction.

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About StefanieB

I'm the Managing Editor of Stitch magazine. I live in Fort Collins, Colorado with one fat cat, one very active dog, and lots of books, crafting supplies, and video games.