Made of non toxic materials</br>Moist heat or cold</br>Just microwave or freeze and apply</br>Free from odor</br>Will not support mold?? bacteria?? or fungal growth</br></br>Product Description</br></br>Specially contoured for the facial area.  Ideal for relief of sinus pressure?? headaches headaches?? migraines?? TMJ?? dry eye syndrome?? fatigue and stress.</br><br/>http://www.amazon.com/gp/product/B000E57CWA