Pre-printed with the “Pure Ice” Polar Bear or the “Crystal Ice” Dog design, our flat ice bags come with plastic twist ties for secure closure. These ice bags have ethyl vinyl acetate additive in the polyethylene base. The purpose of this additive is to increase the puncture resistance and strength of the bag when in freezing temperatures. These ice bags are clear plastic with a drawstring, pre-printed with a dog or polar bear, and feature a built-in cotton drawstring for easy transport and tight closure.