The strap for the belt is made of leather with a width of 45 mm. Since the skin is the most pliable to work (smooth, soft, durable, does not break and does not form cracks on its surface, but it is easy to process). In the robot with it, it is easy to achieve the desired shape. The skin does not stretch during operation, does not change shape. Belts made of this material have a correspondingly long service life, being a good and durable accessory.