Our Cool Roller soft coolers combine the roll-close design of a dry bag with the heavy-duty welded seam, and thermal efficient construction our regular FrostPaks are known for. A big wide mouth opening offers easy access for loading ice and six packs. The roll close design is zipper-free so saltwater corrosion is a thing of the past. Welded seams are leak-free and a heavy-duty puncture resistant liner can stand up to use and abuse