The Gaiam Restore Loop Band Kit is a versatile and effective tool for building muscle mass and increasing mobility in the legs, hips, glutes, and thighs. This kit includes three loop bands, each with a different resistance level: light, medium, and heavy. This allows you to progressively increase the intensity of your workouts as you get stronger. The kit also includes a downloadable exercise guide, providing you with a variety of exercises to target specific muscle groups.