An interior pocket with edging or stitching on the pocket lip. Also known as a piped, bound, welt, or "Reece" pocket.
A besom pocket is a style of pocket that is "set-in," meaning the pocket opening is cut into the garment rather than applied. A besom pocket is finished and strengthened by welting or reinforced stitching. It may have a plain opening or a pocket flap, a buttonhole closure, a tab or other functional or decorative feature. In the American clothing industry, the besom pocket gained its other names from the automated sewing machine that attaches the welts, pocket linings, and cuts the opening in one operation.