Hey! Our bags don't leak! They feature heat-sealed internal liners that are constructed with 18oz vinyl. The bottom and side edges are reinforced with polypropylene webbing and the top utilizes heavy-duty zipper closure to ensure it can take a beating. Equipped with side and top reinforced handles for easier heavy lifting - of fish, right? Insulated with 1/2" closed-cell foam that holds ice up to 72 hrs. Equipped with Coleman plug for easy draining.