→ Black (25-65lbs): Light to medium resistance to mobility exercises and stretching.
→ Purple (35-85lbs): Moderate to severe resistance for moderate fitness exercises and strength training. Also suitable as medium support for pull-ups.
→ Green (50-125lbs) & Blue (65-175 lbs) : Heavy resistance for heavy weight training, strong support in pull-ups. Perfect for speed and agility training such as push ups, squats, bench presses and other exercises.