sewthrough

Sewthrough is a term used in sewing and textile construction to describe stitching that passes completely through the material or patch, creating a seam visible on both sides. This contrasts with methods that fasten or attach using only surface stitches or a back‑side loop, which may not be fully exposed on the opposite face.

In garments and accessories, sewthrough appears in several forms. Sewthrough buttons are buttons that are attached by threading through button holes, the fabric, and the back of the button, with stitches running entirely through the thickness. Sewthrough patches and labels are attached by stitches that go through the patch and the garment, leaving secure anchors on both sides. In upholstery and leather goods, sewthrough stitching can reinforce patches, reinforcements, or decorative appliques by passing threads through all layers.

Applications and considerations. Sewthrough construction provides a strong, durable attachment and a neat, flat finish on both sides, which can be desirable for patches, badges, or thick fabrics. However, it can increase bulk at seams, raise the risk of fabric fray over time, and be less suitable for very delicate or very sheer materials. The choice between sewthrough and other attachment methods depends on fabric weight, intended durability, and the desired appearance. In some cases, specialized stitches or thread types are used to balance strength with fabric care and comfort.