The heat is on with ThermalOn Sleeve (Hand, Wrist, Elbow). This sleeve provides a homeopathic remedy for muscle pain and achy joints. Simply pop this sleeve in the microwave for 45 seconds for heat, or put it in the freezer overnight for a cold pack. Then slip it on and let your chosen temperature soothe your nagging aches and enhance your health. Hand wash and air dry for easy maintenance. Suggested for ages 5 and up. One size fits most. Note: Content on this site is for reference purposes only. It is not intended to substitute for advice given by a licensed healthcare professional. Contact your healthcare provider immediately if you suspect that you have a medical problem. Please see our Terms and Conditions for additional information.