The multi-functional Thule Aion 28L backpack expands from a day pack to a 32L travel backpack for 15% more packable space and has a convenient divider to separate your everyday items from your active gear.The bag's back panel fully unzips and opens like a suitcase for easier packing. Inside, a stowable divider with TPU lining helps to organise your gear while keeping moisture, odour, or dirt from spreading to contents in the rest of the bag. The travel backpack also has dedicated areas for electronics storage and a water bottle pocket. The Thule Aion Sling (sold separately) can be used with this backpack as a hip belt to bear extra weight and provide quick access to vital items.Features of the Thule - Aion - 16" Travel Backpack 28L Expands from a 28L day pack to a 32L travel backpack for 15% more packable space The easy-to-clean TPU divider keeps items organised and prevents odour, moisture, and dirt from spreading to the rest of the bag, it also tucks away when not in use Zippered top pocket keeps small items secure, organised and within reach Compatible with the Thule Aion Sling Bag, which doubles up as a supportive hip belt (sold separately) Quick-access external stash pocket helps store small items Padded storage protects a 15.6" PC/16" MacBook and 12.9” tablet Pass-through panel allows you to secure the backpack to rolling luggage Dedicated water bottle pocket keeps your bottle secure and within reach Internal zippered pocket stores a phone, charger, and other small items during travel External daisy chain allows you to attach items to the bag Outer shell fabric, lining, and mesh are made of 100% recycled polyester from recycled plastic bottles The 600D waxed canvas shell fabric is highly durable and includes a water-resistant coating free of toxic PFCs that repels moisture, dirt, and stains