The Trakk Shell waterproof backpack was designed not only to keep your stuff organized and safe from the elements, but to ensure your tunes can be heard even in the event of a tornado! Giggle all you want, but this bad boy is equipped with a 20W output (5WX2) subwoofer with max-bass technology, 20W HI-FI Bluetooth speakers and a 5200 mAh battery. This means you can literally hear it through a hurricane for 12 straight hours. As for durability, the rugged design sports a hard-shell material that provides protection for all your gadgets and belongings no matter the adventure. Multiple compartments in the backpack provide convenient storage space for your accessories, clothing, and more. As an added bonus, it features an internal USB output power bank to charge all your devices like smartphones, tablets, notebooks! Designer: Trakk Designs