Our 41 long resistance bands for pull-up assist are made from premium natural rubber latex (99.998% protein-free) and stretch up to 2.5x their original length without losing elasticity. These heavy-duty power bands work as pull-up assistance bands, strength bands, and workout bands that resistance users trust. Ideal for pull-up assist band training, stretching bands, gym bands, and bands for working out. These heavy-duty resistance bands function as pull-up bands, assistance bands, pull-up assist band options, and pull up resistance bands for strength training. Ideal as exercise resistance bands for men, gym resistance bands men trust, and resistance bands for stretching. Use as an assisted pull up band, workout band, or resistance bands heavy enough for full-body workouts and pull ups.