WATERPROOF BAGS & CASES At OverBoard, you’ll find a huge collection of the best waterproof bags, backpacks, duffels and waterproof cases for any adventure. Whether your journeys take you up mountains or below the waves, our bags are with you every step of the way, keeping your belongings safe, dry and secure. Our superior-quality waterproof bags keep the water, sand and dust out – while remaining spacious, lightweight and incredibly tough. From waterproof bags like rucksacks for cycling and hiking, to waterproof cases for your phone, tablet and documents, we’ve got you covered. So now you can continue your journey with complete peace of mind, knowing that all your gear is safe while you get busy enjoying your adventure.