The water bag or water bag has several uses in water sports. It often serves as a helpful packing bag for your shoes or laundry when you travel to the lake, sea or other bodies of water. However, its main purpose is to keep your valuables safe while you are on the water. Whether you're on a SUP, inflatable boat or doing other water sports, the water bag will help you keep your stuff dry. When buying a water bag, volume is key. The volume reflects the size of the water bag and should be tailored to the intended use. In addition, pay attention to the material and the closure, as these determine the waterproofness. Most water bags are equipped with a roll closure. Water bags of the brands Sea To Summit, Sealine, Indiana or Wickelfisch offer different colors, sizes and carrying systems.