Key Information ‣ Uses: Delivers soothing heat to relieve knee pain associated with arthritis, strains, and sprains ‣ Directions: Open the package, remove the patch, and apply it to the clean, dry skin over the knee. The patch activates with air and provides heat for up to 8 hours. ‣ Warnings & Precautions: Use with caution on sensitive skin. If discomfort or excessive heat is felt, remove the patch. Do not use while sleeping or with tight clothing that could hinder air circulation.