Interfacing is a textile used on the unseen or "wrong" side of fabrics to make an area of a garment more rigid.

Interfacings can be used to:[1]

  • stiffen or add body to fabric, such as the interfacing used in shirt collars
  • strengthen a certain area of the fabric, for instance where buttonholes will be sewn
  • keep fabrics from stretching out of shape, particularly knit fabrics

Interfacings come in a variety of weights and stiffnesses to suit different purposes. They are also available in different colours,[1] although typically interfacing is white. Generally, the heavier weight a fabric is, the heavier weight an interfacing it will use. Interfacing is sold at fabric stores by the yard or metre from bolts, similar to cutting fabric. Sewing patterns specify if interfacing is needed, the weight of interfacing that is required, and the amount. Some patterns use the same fabric as the garment to create an interfacing, as with sheer fabrics.[2]

Fusible interfacing

Most modern interfacings have heat-activated adhesive on one side. They are affixed to a garment piece using heat and moderate pressure, from a hand iron for example. This type of interfacing is known as "fusible" interfacing.[2] Non-fusible interfacings do not have adhesive and must be sewn by hand or machine.


  1. 1 2 Moyes, Pat (1999). Sewing Basics: Creating a Stylish Wardrobe With Step-By-Step Techniques. Taunton Press. p. 67. ISBN 9781561582662.
  2. 1 2 Creative Publishing International (2009). Complete Photo Guide to Sewing: 1200 Full-Color How-to Photos. Creative Publishing International. p. 70. ISBN 9781589234345.
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