This episode examines the Shabbos prohibition of sewing, focusing on tightening loose threads and functional stitching. We discuss when pulling a thread to reconnect fabric constitutes a biblical violation, the role of knots versus multiple stitches, and cases where liability applies even without a knot. The shiur also clarifies rabbinic prohibitions, attaching items to garments, and the use of pins or stitches. Finally, it addresses drawstring-style sleeves and arm fastenings—distinguishing between prohibited tightening that resembles sewing and permitted adjustments designed for regular opening and closing. Clear practical guidance for common clothing scenarios on Shabbos.