Stylo Mama Gel Ice (cold pack) is fabricated specially for keeping Mama's breastmilk up to 14 hours. Instructions: Store Gel Ice in freezer for overnight and it can last up to 14 hours. It is a reusable gel ice and consider damage when punched. Material: Thermagard® Thermagard® effectively reflects up to 97% of all radiant thermal energy directed at it. It fabricates easily, can be sewn or welded, is highly puncture-resistant, and lends itself to gas-flushing. Because of its unique properties, Thermagard® is the most effective answer to the problem of heat management. Packaging of Fresh and Perishable Products When used with proper refrigerants, ThermaGard® - packed frozen, chilled, or fresh products freighted over long distances, arrive in pristine condition. This means for you, commanding premium market prices for your products Protection of TemperatureSensitive Products ThermaGard® acts as ultra protective insulation barriers against radiant heat for pallets of temperature-sensitive precision items in the aviation, scientific and medical industries. Insulation of Industrial Buildings & Domestic Homes ThermaGard® excellent thermal characteristics, fire-retardant compound, and 'easy-to-install' flexibility, make it the perfect material for use in the insulation of industrial buildings and domestic homes. Acting in tandem with conventional insulation, ThermaGard®'s high performance in minimizing heat penetration results in energy-saving, cost-effective environments that contribute to reduced maintenance cost. Practical, Personal Products ThermaGard® can be easily fabricated into designs of household and personal items such as protective covers, bags, sun-cap, clothing, umbrella, etc.