HEROLILY Advanced Reusable (HDR) Heat & Ice Sheets Packs, Extreme Freeze Cooler, for Food Hiking Camping Outdoor, 15" x 11" 4 Ply Re-freezable Non Toxic Leakproof Refrigerant Pack ? Herolily Advanced Ice Approved By The United States FDA Certification & SGS ISO9002 Certification! It is non-slimy, non-toxic, food touchable and environmentally safe. Better than other previous ice pack, ice sheets, ice blanket, techni ice,etc! It the most cost effective ice replacement product on the market today! Can be reused hundreds of times! ? Herolily Advanced Ice not only provide for camping,hunting,hiking,boating,fishing,cooling effects for transportation of foods and seafood, perishables, pathology samples, medicine, vaccines etc.,but also an effective heat pack for sore muscles and back pain! ? To Freeze & Heat: Put hydrated sheet into refrigerator/freezer.Or in the microwave for 1-2 minutes or wrapped in a towel in hot water. (Notice: The longer it is frozen, the longer it can last and stay cold.And check to make sure sheet is not too hot before placing on body. Use a towel between your body and Ice Sheets for soothing relief.) ? Product Dimensions: Non-hydrate sheet 15.5" (L) x 11" (W) x 0.1" (H) / Hydrated sheet 15.5" (L) x 11" (W) x 1.25" (H) ? This model is currently used by many of the industry users and home kitchen .it is considered a world industry standard and can be bulk hydrated. It can also be cut in between cells to fit any size container.