SPRI Xertube Resistance Bands Kit with Door Attachment (1 Green Xertube, 3 Xercise Bands) Increases the challenge of toning exercises, while their varying lengths accommodate muscle groups from your shoulders to your legs Easy to store and surprisingly versatile, the set is perfect for home workouts, travel, and taking to the gym. Lightweight & Portable Includes: (1) Xertube & (3) Xercise bands provide different levels of resistance for lower body training Includes door attachment