Designed for light and speedy mobility, the strap can be rolled up to stash in a gym bag, suitcase, or overnight trip making it perfect for travel, gym, or in-home use * High-quality rubber material offers progressive resistance * Helps you isolate target muscles more effectively * Tube Lengths: Very Light/Light = 44" -- Medium = 50" -- Heavy/Ultra Heavy = 53" * Available 5 levels of resistance: Very Light (Yellow), Light (Green), Medium (Red), Heavy (Blue), and Ultra Heavy (Purple)