The waistband of elastic pants is a rubber band, which is hidden inside the waistband and belongs to the built-in waistband.

Fastening method of belt:

First, the waist belt is folded into the same length, the left belt is folded inward, and the right belt is folded reversely, bypassing the left belt, folding the wrapped right belt outward, and fixing it by hand. Then, the folded right belt passes through the vertical knot formed by bypassing the left belt just now and is arranged into a proper shape.