Travel confidently knowing your items are safe with the Loctote Flak Sack II Anti-Theft Drawstring Backpack. This clever back doesn’t just carry your gear, it protects it, too. An upgrade to its predecessor, the latest Flak Sack offers extra security. The backpack is ideal if you want to keep your belongings on you without having to keep an eye on them. Made from FLAKnit fabric, the splash-proof backpack has an A9 cut level, the highest cut level possible. The drawstring bag is also lockable and comes with a built-in lock. Simply lock it while you travel to keep your valuables safe inside. With a 13-liter capacity, the backpack can fit your iPad, Macbook and more. Plus, it only weighs two pounds including the lock.