The exterior however is not slash-proof, which makes sense given the lower price when compared to other backpacks on this list. This affordable backpack features a built-in three-digit combination zipper lock, and there's a hidden pocket on the back that can only be accessed when the bag isn't being worn. The material is not as tough as that of other anti-theft backpacks. The Details: 21.7 x 13.8 x 8.7 inches | 3 pounds, 13 ounces | 45 liters | Nylon and polyester | Water-resistant And testers did note that the zipper lock has a learning curve, so buyers should make time to practice before using it on a trip.

It's a bit heavy, but that's to be expected for the size. A 270-degree clamshell opening makes it easy to pack-our testers estimate that efficient packers could fit somewhere between one to two weeks' worth of clothes inside. The bag also has external attachment points for a sleeping bag or jacket.

A Velcro laptop sleeve fits a 13-inch Macbook with room to spare, and there's a side pocket for a water bottle. There are lots of pockets, including a large zip mesh pocket, a medium-sized zip mesh pocket, a medium-sized nylon pocket, a nylon pocket for pens/pencils, and a medium-sized nylon bag for the locking cable. This combination of security features makes it nearly impossible to access the bag when worn, providing peace of mind-though, of course, that also means there isn't a great way for the wearer to quickly access items inside. During the slash test, we found that the bag shows cuts, but it's not easy to get into with a knife. Lock the zippers by connecting the zippers to each other, then hooking them onto a built-in clasp (there's also a flap that obscures the zippers and clasp). The bag has a lot of great anti-theft features, including four lockable zippers, a stainless steel locking cable that you can attach to any fixture (lock not included), and cut-resistant materials. Buyers will want to keep in mind that this is not so much a day-to-day pack as it is a piece for extended trips or even backpacking. All the straps and handles are well cushioned for comfort on shoulders and hands, and it has hip and chest belts to distribute weight. With a 45-liter capacity, this backpack-the highest scorer on our tests-is big enough to replace your carry-on yet comfortable enough to wear for extended periods of time. It's a bit heavier than some of the other backpacks we tested. For more options, keep reading to find the best anti-theft backpacks to buy right now. Our number one pick? The PacSafe Venturesafe Exp45 Econyl Anti-theft Carry-On Travel Pack-it's comfortable, spacious, and held up to our tests well.

We found PacSafe to be the best brand for anti-theft backpacks. We tested 14 anti-theft backpacks in our product testing lab, putting their security features to the test by attempting to cut through exteriors and identify and break through locks and zippers. Finally, many anti-theft backpacks come with tools like locking cables, combination locks, and RFID-blocking technology (about which we provide more detail later). Second, the zippers are usually hidden by flaps, so it often looks like there's no way into the bag. First, most are made with an extra-tough, anti-slash material that makes it extremely difficult for would-be thieves to cut their way inside your bag. But what makes a backpack 'anti-theft'? A few things. If a backpack is your preferred way to tote your belongings, you might want to invest in an anti-theft model.

Extra large zip lock bag