But would like to use the ball for massage, trigger point treatment, etc., this is for me with this ball impossible. I have rarely in my life had such a toxic, caustic smell in the nose and Mother Nature has endowed us with senses accordingly in order to know whether we do something well or you should stay away from. I would not let my skin come into contact with this ball. Steer clear for all those who want to use the ball to the mobilization.