Our bands are made of high quality latex. They are stronger and able to stretch further. You will feel the same resistance after a dozen reps.
Second, our bands are comfortable, soft and easy on the skin. The only way to achieve that is to let the latex rest for a long time in tightly controlled circumstances such as temperature and humidity before making the bands.
Both of these involve a higher investment for us but we think it’s worth it to create a better product.