5 color professional bands can be used alone or stacked in any combination up to a maximum equivalent of 100 lbs.: yellow(10lbs), red (15lbs), blue (20lbs), green (25lbs), black (30lbs). Accessories: 2*legs ankle straps, 1*door anchor, 2*soft handles, 1xinstructions.Multifunction fitness equipment: resistance band training are extremely effective at burning fat and increase muscle strength, and also help you boost stamina, flexibility, range of motion, exercise different muscle groups, such as shoulder, arm, leg, back, stomach and etc. Portable personal gym: pack your bands, grips, straps, at the gym, or at home.