Hot & Cold GO-GIRL Gel Patches are the perfect gel packs to rid you of aches and pains from those day-to-day dramas. Got a headache from your husband, boyfriend, boss, the kids or traffic? Or just a little swollen from your monthly botox injections? Then these soft heart shaped gel-packs are for you. Lower back pain needs some heat? - soak gel patches in hot water for 5-10 minutes let pack cool, then apply. Or keep in refrigerator to keep cool. Soft enough to use on your child's knee or head. Gentle to the touch even when chilled.