... water, salt, activated charcoal, cellulose.Instructions1. Open the outer package when use.2. Remove the inner pouch from the protective pack ... 2. Do not swallow the contents3. Supervision is needed when using the warmers on infants, children, elderly and people with physical disability ... or too hot.6. Disposable, simply throw it away when done!Toe warmer is environmental,non-toxic and safe heat ...