Strength: Weakest - Strongest

Yellow Thin

Red Medium

Green Heavy

Blue XHeavy

Black XXHeavy

Product Features 

• Ideal for upper body & lower body exercise to strengthen muscles, increase range of motion, and improve flexibility 
  
• Convenient and portable product that works anywhere you go
• Color-coded Progressive Resistance system allows users to recognize improvement as it happens, as you grow stronger, you can move up the next color
• Use to rehabilitate muscles through simple yet effective workouts