Different Color:Yellow (10 lbs), Red (15 lbs), Green (20 lbs), Blue (25 lbs), Black (30 lbs). All exercise bands can be used alone or stacked in any combination to a maximum equivalent of 100 lbs. Material:The Resistance band is made of natural latex. It has strong abrasion resistance and elasticity with non-slip handle. Perfect Set for Personal Home:Each Fitness belt is carefully manufactured to prevent breakage and can withstand strenuous daily exercise. Easy to carry, you can exercise anytime, anywhere. Suitable for Variety of Exercise:Our Resistance Exercise Bands can apply to different types exercise. Good for exercise your arms, shoulders, chest, legs etc. Lightweight and portable:Also comes with convenient travel pouch! You can also take your Workout Bands to Gym, Office, etc.