Celina Backpack | Tumi US。The Tumi Celina Backpack is a large backpack that can hold a 16-inch MacBook and has plenty of interior space. It has a double-zip entry to the main compartment, a zip entry to a padded laptop compartment that fits a 15-inch or 16-inch MacBook, and a leather top handle. It also has a front U-zip pocket, two front zip pockets, a front zip entry to the main compartment, a side zip pocket, and a side double-zip water-resistant water bottle pocket. The backpack is made from nylon and leather and is 16 inches long, 10.6 inches wide, and 6.5 inches high. It weighs 1.82 pounds.