From the BeisTravel Website: If you’re looking for a functional and stylish backpack, you honestly can just stop reading this product description now because — congrats — you’ve found it. With a trolley pass-through, padded interior sleeve, and two (yes, two) water bottle pockets, this is the ideal laptop backpack for work, school, or play. But wait… there really is more. This bag has a full-zip opening which means it’s the ultimate easy-to-organize travel backpack.Laptop Friendly Key Leash Trolley Pass-through Water Bottle Pocket Organizational Pockets