underbånd

Underbånd is a term used in sewing and garment construction to describe a narrow strip of fabric or elastic attached to the inside of a garment edge or seam. Its primary purpose is to reinforce, stabilize, and shape the edge, helping to prevent stretching, distortion, and fraying. Underbånd can be made from various materials, including woven fabrics, knits, or elastic, and may be fusible (iron-on) or non-fusible.

Types and applications of underbånd vary with the garment. Stay tapes or stay bands, placed on the inside of seams, are a common form used to support and preserve the shape of areas under stress. Bias-bound or folded-under underbånd create a neat finished edge, often on necklines, armholes, hems, or waistlines. Elastic underbånd provides stretch and support, frequently used in knit garments, activewear, or underwear. Some underbånd are fusible for easier attachment, while others require sewing to secure them properly.

The placement of underbånd depends on the design and function of the garment. It is used to prevent edge curling, add structure to curved edges, and increase the durability of areas that experience repeated movement or tension. In addition to its functional role, underbånd can contribute to a cleaner finish and better fit.

Care considerations for garments with underbånd depend on the materials involved. Elastic components may be sensitive to heat and vigorous agitation, so following the care instructions for the fabric helps preserve edge stability and elasticity over time.