Two brand new bands, Xtra Light and Light. From the manufacturer: Resistance exercise bands set made of 100% natural latex-free of non-natural Thermoplastic Elastomer (TPE). Bands strengths - X-Light: (5-8 Ibs), Light: (8-10 Ibs), Medium (10-15 Ibs) Combined the resistance bands by stacking or knotting together, you can enjoy many different resistance levels for your workouts at the same time. This booty band set can be integrated seamlessly with every popular workout program such as Yoga, Pilates, and etc. Or use them for general exercise, stretching, strength training, power weight programs. Not only these fitness resistance loops are worked as physical exercise therapy bands to help people rehabilitate from leg, knee or back injuries, but work well for recovering torn MCL and ACL, knee replacement, patella, and meniscus rehabilitation. Moreover, they are ideal for postnatal mothers to improve and keep the body in shape.