The comfortable fit depends on how wide and elastic the webbing is. When it is at the optimal size, it stays close to the body and does not slip. This is very important for comfort in two ways: on the one hand, the skin is not compressed, and on the other hand, there is no increased friction. Furthermore, not only the comparison test winners of the belt bags are often very flat. This has the advantage that the contents do not constantly hit the stomach and / or hips. This also has a positive effect on the wearing comfort. If the running belt is constricting, then you should check whether it is in the ideal place and whether it is the right length. Possibly. an adjustment is required. In the ideal case, the sports belt is so comfortable that you hardly notice it and tackle the daily jogging route without impairment.