Keeps contents cold 48+ hours, durable, dual zipper pulls for easier opening and closing, wire frame design open fully to allow for wide access, exterior, PVC – coded polyester shell is waterproof, wipeable, and puncture resistant. Lightweight and condensed free.ice as it melts to avoid leakage. Interior height is wine bottle friendly. Top handles are great for grab and go lifting. Adjustable shoulder straps include cushioned shoulder pads for extra comfort and support.