The 48‘’ exercise tube bands are made from 100% high-grade natural latex with sturdy metal carabiner clips that will not snap, or deform. These 5pcs stackable tube bands have different resistance levels: Yellow(10 lbs), Red(30 lbs), Blue(15 lbs), Green(20 lbs), Black(25 lbs). The bands can be used alone or stacked in any combination to achieve your optimal resistance level up to 150 lbs. Suitable for Different Fitness Levels -- Whether you are a seasoned professional or just starting out the tribe resistance training set, you can adjust the intensity of your bands set to fit for all whether beginners, experts, men, women or children. You can use it with your family members. Our bands can apply to different types exercise.Perfect for toning your arms,shoulders, chest, glutes, legs etc. Also comes with convenient travel pouch.You can also take your bands to Gym, Office, and even workout on vacation.