The Manus Comfort Putty does everything a great putty should do: it strengthens weakened grasp through exercise and is used for rehabilitative exercise or stress relief. It is odorless, does not stain and will not leave any residue on the patient?s hands.Manus Comfort Putty is non-toxic, greaseless, hypo-allergenic and latex-free.Manus Comfort Putty is available in 6 colors/resistances and comes pre-packed.