Gorilla GAINZ Booty BandsGreat for at home training options, amping up your gym programs, and lightweight for packing when traveling and on the go workouts! Inner Grip Strip (No slipping, rolling up or pinching) Developed with the primary focus being the glutes and hips; however, you can also use for working additional muscles including the quads, hamstrings, abs, shoulders, and upper back muscles. Available in 6 levels sizes (resistance length) See below for descriptions