Koolpak Deluxe Reusable Large Hot Cold Gel Pack with Protective Sleeve Cover

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! Protective sleeve is recommended when using hot or cold packs directly against the skin to protect skin from heat or freeze burns