The lower garment is worn to wrap and fold around the waist in four times(the Four Noble Truth). Shamtab represents moral discipline. The borders at the top and bottom of the garment are like a fence holding us back from engaging in non-virtue (conscientiousness).

Source: Adopted from “The Sewing Book” from the Madhyamaka Kadampa Meditation Centre, rephrased into smooth sentences and full paragraphs.