Ergowriter Invalid Rings Reusable medical electrodes can be Nasal Cannulas Reusable medical electrodes can be used to directly target problem areas in order to treat arthritis related pain joint and muscle pain and it even offers lower back pain relief * Repairable The flame resistant black neoprene (not made with natural rubber latex) cushion can be patched or repaired to extend its use Designed to alleviate the pain of writing associated with arthritis and other hand afflictions * Comfortably and correctly positions the thumb to reduce stress placed on the wrist * Can be used with most standard pens and pencils * Pen included blue ink * For right or left hand use *