- 24Ss new Prad* triangle logo double welt sawtooth thick-soled elastic short boots. This leather Chelsea boot combines multiple silhouettes, classic details and contemporary elements. The sole is double welt design, full of modernism. Upper: calf leather Lining: cowhide Inner heel height: 5.5cm Sole: Double welt serrated rubber sole Code number: 35-39 (40 is custom-made and cannot be returned or exchanged),