product 1. These elastic latex straps are sturdy and durable, so they are guaranteed to last, stay strong and help you achieve your fitness goals quickly.2. These resistance bands are great for improving mobility, flexibility, and strength before, during, and after a workout.3. Beginners like to use them for gentle stretching, light strength training, and assisted pull-ups, while advanced rely on them for powerlifting, ring extensions, and deadlifts. As you progress, simply transition to the next highest resistance level for a more challenging workout.4. Portable and practical: Take the bracelet anywhere - easy to use when traveling, at home, in the gym, warming up, etc. If using with an exercise board system or resistance training board system, please note that you must use shoulder strap protectors to prevent damage to the shoulder straps at the sharp corners of the resistance board system.