TheraBand Resistance Band 25 Yard Roll, Super Heavy Silver Non-Latex Professional Elastic Professional grade exercise and resistance bands for stretching, toning, and conditioning all major muscle groups, increases both strength & flexibility subtly and naturally without weights Simple & easy to use product for upper & lower body exercises that can be performed anywhere, is ideal for conditioning & rehabbing muscles as well as specific training for yoga, crossfit, lower body pilates, and running Color-coded Progressive Resistance system allows users to recognize improvement as it happens as you grow stronger you can move up to the next color, making these bands ideal for strength training and physical therapy programs Non-Latex Professional Resistance Bands with no scent and no powder meet the needs of patients, practitioners and personal users with latex allergies, and are the best option for facilities and hospitals with a "no latex policy" Super Heavy Silver Bands are the seventh of eight levels of resistance and an alternative to weight training or supplement to strength training, they offer 10.2 lbs. resistance and 40% increase from preceding color at 100% elongation and 15.3 lbs. at 200%, each roll measures 25 yards long x 4" wide