One of iGuerburn Pro Series Resistance Loop Exercise Bands is a set of three professional resistance bands that offer three resistance levels ranging from 35-65 pounds. These bands are a step up from standard premium resistance loop bands and are ideal for any workout routine. Nantong July Fitness and Sports Co., Ltd. is a leading sports and fitness product company located in Nantong City, Jiangsu Province, China, and has been committed to providing top-quality products and services to its customers in the industry for over 12 years.