FrostPak™ Arctic Double WallCold holds even in the heat of adventure. The FrostPak Arctic Double Wall uses dual layer insulation and RF welded seams to keep contents cold when it counts. Meet our FrostPak Arctic Double Walls, that combine heavy duty construction and thermal insulation with a great price for a long lasting, super thermal efficient soft cooler that won't break the bank! All sizes built with double layer insulation, nylon coil zippers & dirt resistant extra coated