Underlining helps absorb perspiration, reduces wrinkling, and strengthens. It can add warmth, can prevent fabrics from being over-handled during construction, and can make a so-so fabric look and sew like an expensive fabric!
What to use as underlining?
The most typical fabrics used for underlining include cotton batiste, silk organza and light-to-medium-weight cotton broadcloth, but a wide variety of other fabrics can be used for this couture technique. Fabrics as simple or inexpensive as muslin or even lightweight fusible interfacing can be used as underlining.
Do I need to line my fabric?
The purpose of lining fabric is to make your garment more wearable, long-lasting and comfortable. They are usually lightweight and have a soft or silky texture. Not all items need to be lined, though. ... To make the inside part of the garment soft and pleasant to the touch.