What kind of treatment is the 'binding finish' mentioned in the description?

You encounter this word on the inside of the neck. The stud half-sleeve T-shirt has its inner neckline seam wrapped in fabric with a binding finish^[1], and the baby argyle dress has its inner neck seam wrapped once more very thinly with self-fabric and then pressed down with stitching to finish it^[2]. It means the same method is applied to different garments: a short-sleeve T-shirt and a dress.

Binding refers to a finish where the edge of cut fabric is wrapped with a long, narrow strip of fabric and sewn together. The seam allowance is not left exposed, keeping the inside neat, and the thickness added by wrapping it also helps prevent stretching. The neckline is an area that experiences tension every time you put your head through it, making it prone to losing its shape, and binding is one of the ways to reinforce that area. Here, 'self-fabric' means that the same fabric as the garment was used, rather than a separate tape^[3]. Applying a different fabric can result in slight differences in shrinkage or color after washing, so wrapping with the same fabric ensures changes appear more evenly.

hmmm, for someone who cuts off labels before wearing clothes, this single line is also a sentence that describes the finish that touches the body first.