The Gaiam Evolve Resistance Band Set includes 4 resistance bands in light, medium, and heavy levels, perfect for working out different muscle groups such as legs, arms, back, and core. The set also comes with an exercise guide to help users create a comprehensive workout routine. The bands are color-coded in blue, green, and purple, making it easy to distinguish the resistance levels during workouts. With this set, users can take their fitness training to the next level and achieve their fitness goals effectively.