Cooler Shock Ready to USE 4 Mid Size Cooler Freeze Packs 10"x 9" - No More Ice Replaces Ice and is Reusable Better than Ice - 4 Mid size 2 pound gel packs makes items in cooler slushy cold Accelerates cooling with burst cooling at 18 degrees - 7 mil thick flexible mylar READY to USE. Also available in dry packs that you hydrate on Amazon non-hazordous ingredients, child safe. Lasts up to 48 hours, reusable again and again... 4 packs replaces 12 pounds of ice, no dirty water in your cooler