The Advantage to the nylon band, is they are very durable, lightweight and breathable. If you compare it to the regular sport band, your wrist won’t trap moisture like it does under the sport band, the downside to the nylon sport band, is that if they do get wet, you do want to thoroughly dry it out, as mildew could set in, but I have not had that problem. Altogether, the nylon band is very comfortable.