Black Mountain Products loop band set comes with 5 bands of resistance varying from extra light to extra heavy, making them perfect for anyone from a beginners to fitness experts. Each resistance band set comes with a convenient carrying bag and starter fitness guide. Exercise loop bands are an ideal tool for any workout and can be integrated into popular programs like P90X, CrossFit, yoga, pilates and many more. Loop bands can also be used for general strength training and exercise. While the bands are great for general exercise they are also very beneficial for physical therapy and rehabilitation. Each set comes with a manufactures lifetime warranty.