Two Cathe Extra-Smooth TPE Gray Extra-Heavy Tension Firewalker Resistance Band Loops Two Xtra-Heavy resistance 10 inch loops Our hardest resistance Loop: The Cathe TPE Xtra-Heavy tension (10 inch) gray-reistance loop has the greatest amount of tension of any any of our Cathe resistance loops Because Smoother is Better: Cathe TPE Gray-Xtra-heavy-resistance loop is latex free and offers superior and smoother elasticity throughout the entire exercise movement, including both the concentric and eccentric phase of the exercise Just the right length (Cathe 10 inch loops): To get the proper tension throughout an exercise using a resistance loop you need to select a band of the proper length. A 10 inch loop is ideal for most exercisers and will alow consistent and smooth tension throughout each exercise Two Cathe Extra-Smooth TPE Gray Extra-Heavy Tension Firewalker Resistance Band Loops - Perfect For Shaping, Legs & Glutes As Well As Upper Body Strength, Yoga, & Therapy Exercises