... pack Supply OEM The chemical heat pack is easy to use and bring you warm instantly Effective assistant application range: ( ... a cold (3) dysmenorrheal, post partum abdomen recoverCharacteristics1. easy to use, it can reach 43 degree centigrade2. non-toxic, non-caustic ... heat pack can release heat within 5 seconds, convenient to use while driving, traveling, fishing, hiking, or camping. Usage1. Locate ...