This totally new concept uses natural clay beads and moisture to provide warm, effective soothing pain relief. The beads naturally absorb and retain moisture from the air for an extended period of time. The wonder beads use natural scent, that provides soothing aromatherapy which enhances the overall experience of providing total comfort.. Simply microwave for warm therapy. Contains natural clay and non-toxic oils. Easily conform to body. Double safety tested. CPSIA, FDA and TRA (Toxicological Risk Assessment) reports are available upon request.