Customized First Aid, ComfortClay Plush Large Pack - Hot Cold Therapy & FDA Compliant, Ground-breaking new ComfortClay formula combines clay, glycerin and water for a new therapeutic experience Transformative formula works as both a hot and cold therapy remedy Soft plush backing enhances your relaxation with a soothing surface FDA and CPSIA compliant Use Instructions printed on item ... #WHF-CL17 $3.04/each.