PACKI BACKPACK COOLER Throw the Packi Backpack Cooler over your shoulder to bring the party wherever you go. Bonus: you can add two of your favorite Swigs to the side pockets! TRI COOL TECHNOLOGY triple-layer construction including PVC-coated, polyester exterior, extra-think, closed-cell foam insulation, and AquaSeal heat-welded seems. WEATHER-RESISTANT PVC-coated polyester exterior is waterproof, sand-proof, puncture-resistant, and wipeable. LEAKPROOF LINING AquaSeal heat welded seams ensure a leakproof lining (does not feature a waterproof zipper. It may leak liquid contents when turned over, only the lining is considered leakproof.)