Professional Gel Pack Manufacturer Hot Cold Gel Pack 1) Microwavable, reusable; 2) MSDS, CE tested; 3) OEM welcomed Hot Cold Gel Pack Also known as: cold hot pack, gel pad, gel pack, compress pack, microwavable hot cold pack, etc. MaterialPVC, PE ... . IDEAL FOR:Muscle achesPainsSinusitisMenstrual cramps. Contents: Trimethylene glycol, CMC, Water Hot Cold Gel Pack