With three bands that offer 8lbs/3.6kgs-18lbs/8.2kgs of progressive resistance, youll get all the muscle-tightening you want from weights, without the bulkiness and heaviness. Dont be fooled by the simple construction, this lightweight, portable band engage every muscle group and aid in body toning, stretching and flexibility. Made with premium latex, the band helps improve range of motion and targets the core muscles.