Made of the highest quality and eco-friendly natural latex which is extremely durable, and bands will maintain their resistance for a long time. The exercise bands set were designed using ideal resistance levels to help you maximize your workouts. These bands are the perfect resistance bands for legs and butt, toning your chest, abs, biceps, triceps and more! Specification: Length: 1.2 meters Weight: 0.45kg Material: TPE Color: Red, Yellow, Blue, Green, Black Level: Yellow (10 lbs), Green (15 lbs), Red (20 lbs), Blue (25 lbs) and Black (30 lbs) note: 11pcs: Standard model 100 pounds 11pcs max: 150 pounds of upgrade Package Content: 2 handles, 2 foot sets, 1 door buckle, 1 net bag, 5 pull ropes