Adjustable Resistance Bands set: Yellow 10lbs, Green20lbs, Red30lbs, Blue 40lbs, Black50lbs. All exercise bands can be used alone stacked in any combination to a maximum equivalent of 150 lbs.Our resistance bands apply to different types exercise.Toning your arms,chest, glutes, legs.Attach a storage bag you can take it anywhere.The resistance band is made of natural latex. Strong wear resistance and great elasticity, non-slip handle, comfortable and absorbent.It will up to all your challenges.