Fortresses like the Unigear Trop-Storm BP are excellent waterproof options. With a roll-top closure and impermeable material, this bag keeps gear dry and protects it from splashes or short immersions. It's perfect for rainy days and water sports—a PVC material with a high density and thickness that will resist punctures and aging. Thanks to the Duraflex buckle and the metal lock, enhanced joints make it as tough as rocks. With a 35-liter capacity, you'll be able to carry your essentials for two days, while the laptop compartment fits laptops up to 15.6 inches and provides extra organization to help safeguard your valuables.