A resistance loop band is an elastic piece of exercise equipment in the form a continuous loop used for strength training and rehabilitation. They are versatile, cost effective, and portable. 

Loop bands come in various sizes, resistance levels, and materials. For example, fabric loop bands tend to be more comfortable, machine-washable, and latex-free. Rubber bands tend to be easier to clean immediately after use with a sanitizer. 

It is recommended to read product details as they are specific to the company that has produced them.