... high polymer, which is nontoxic, clean, safe and environmental. The opening cans airproof by itself. After ... polymer in bag will quickly absorb water and became gel. The gel is stretch and has a ... pain, and physical therapy for strain bruise, hemorrhage and sepsis.3. UsageTo be added water into the bag, and then ... CE, SGS, MSDS, ROHS, etc. Miraculous ice bag, fill ice pack, ice pack for pet,cooler bag