Exufiber® Gelling Fiber Dressing, 2 x 45 Centimeter, 1 Case of 25 Foot Care 100 FOOT CLINICAL ROLLS * Style:Right Ear 100 FOOT CLINICAL ROLLS * Heavy Blue * Available in seven levels of resistance * Made of natural rubber * Thera band colors increasing in difficulty through seven levels from tan to silver * The color coding system provides positive reinforcement and feedback for gauging results * 30 psi * The inexpensive way to reliably measure hand and finger strength * With an indicator dial that remains at the maximum reading until reset * Calibrated in psi * and bacteria you can see that Exufiber is full of tightly entangled fibers that minimize the free space for fluid or exudate to flow