Large Smell Proof Backpack - Large backpack with carbon lining and full smell proof protection. Double Velcro And Zipper Seal - Each back comes with a smell proof and waterproof seal with a velcro cover that protects both the zipper and built in lock. Built In Combo Lock - Each bag comes equipped with a built in combo lock to protect your goods and your privacy. Store your contents and personal valuables without worry Sleek And Stylish Design - Each bag has a sleek, all black design that looks unassuming and classy. A sewn in leather patch with our classic Herb Guard logo adds a smooth finish to the bag's exterior. Doubles As A Hand Held Case - The backpack contains a side handle allowing you to wear it comfortably on your back or carry it as a case. NEW UPGRADED YKK ZIPPERS BUILT TO LAST A LIFETIME - We listened to our Customers upgraded our case to the highest quality zipper on the planet