Fits 16" MacBook or 15.6" Laptop, Fits 12.9" Tablet, 28L Capacity Expands to 32L, Water-Resistant Exterior. The black Aion 28L Travel Backpack expands from a 28L day pack to a 32L travel backpack for 15% more packable space. Furthermore this bluesign-certified bag is made from durable recycled materials. A rugged and durable waxed canvas exterior fabric develops even more character as it ages and has a water-resistant finish that is free from toxic PFCs. The bag's back panel fully unzips and opens like a suitcase for easier packing. Inside a stowable divider with TPU lining helps to organize your gear while keeping moisture odor or dirt from spreading to contents in the rest of the bag. Dedicated areas provide room for electronics storage and a water bottle pocket. The Thule Aion Sling available separately can be used with this backpack as a hip belt to bear extra weight and provide quick access to vital items.