Nylon;Reusable round hot/cold gel pack for temporary relief of minor aches sore muscles; Features our fun Goofy Group™ face on front; Non-toxic and latex free; WARNING: For external use only. Not suitable for children under 3 years of age; If contents contact skin, wash area with mild soap and water to avoid irritation; Shipping available to U.S. addresses only; Product Size: 4.5" w x 4.5" h x 0.5" d;