Koolpak Hot and Cold Gel Packs Reusable, Microwaveable Heat and Cold Pack for Pain Relief - Long-Lasting Therapy with Soft Nylon Cover - Flexible Design for Stomach, Back, Neck & Legs. High quality internal gel can be reheated and frozen repeatedly. To cool down, simply place in your freezer and allow to cool - normally charged in only 2 hours. To heat up, place the pack in a microwave for 20 seconds and then check - if it requires more heat, follow up with 10 second bursts until hot. Conforms easily to body contours for effective treatment Packs can remain hot or cold for 2 hours at room temperature.
