Keep your valuables dry and safe, whether you’re at a poolside barbecue or on a deep-sea fishing trip. This bag's made of durable, rubberized 500D PVC, with a roll-top closure and heat-treated seams that make things completely airtight (meaning the bag'll float if you leave some extra air in there). The best part? It comes with a removable, insulated layer that can keep food and drinks cold for hours. Plus, there's a front pocket with a mesh window to wrangle odds and ends once you're away from the water.