Product description: 3M Reusable Cold Hot Pack - Dual purpose - flexible ice or soothing heat Cold for pain and swelling, heat for muscle aches and stiffness - Contains Dry Natural Rubber Ideal for pain and swelling caused by bumps, bruises and sprains and for soothing muscle aches and stiffness. - A soft, gel-filled pack that can be used to provide hot or cold therapy - Be sure to follow the instructions for use found on the box and the pack - 3M™ Nexcare™ Reusable Cold/Hot Pack is a gel-filled pack that provides a convenient way to apply hot or cold therapy Direction for use: Cold therapy is recommended for use for the first 48 hours following the injury. Hot therapy should not be used until 48 hours after the injury. Application: Cold Application: - Store cold pack in freezer for at least 2 hours - Insert cold pack in cover or wrap in cloth - Apply cold pack to injured area. Remove pack if it becomes uncomfortable. Do not apply for longer than 20 minutes at a time. Hot Application: - Lay flat in microwave oven and heat at full power for 20 seconds. If pack expands like a balloon: Stop heating. Pack is too hot. Let pack cool. Check for leaks. - Remove pack carefully from microwave and knead to distribute heat evenly. Check for desired temperature. - Insert pack into cover or wrap in cloth. - Apply hot pack to injured area. Remove pack if it becomes uncomfortable.