CanDoTheraputty hand exercise material is the standard in resistive hand exercise material. Each color-coded putty has a different consistency ranging from xx-soft for strengthening the weakest grasp to extra-firm for developing a stronger grip. Available in convenient easy-to-open plastic containers (2 ounce) for individual patients to use at home and a choice of larger containers (1 pound) for the hospital or clinic. CanDo Theraputty material is gluten, latex and casein free.