The Thule Aion 40L travel backpack is equipped with a removable roll-top bag and its maximum capacity is still classified as carry-on luggage, making it the ideal backpack for air travel. The removable bag with a roll-top has a TPU insert to ensure that odors, moisture or dirt are not transferred to other items in the backpack. Plus, it's easy to clean, making it perfect for storing sports gear or dirty clothes. The carry-on bag has dedicated spaces for storing electronics and a pocket for a water bottle. With your backpack, you can use the Thule Aion Sling waist belt (sold separately) to take the strain off your walk and make it easy to quickly access your most important small items. The removable bag with a TPU top hides away after use and allows you to store various items without odor, dirt or moisture spreading to the rest of the backpack. Compatible with Thule Aion Sling Bag, which allows you to use a supportive waist belt (sold separately). A zippered top pocket allows you to store small items safely and orderly so that they are always close at hand. The padded pockets can safely store a 15.6" PC laptop, a 16" MacBook, and a 12.9" tablet. A special pocket for a water bottle allows you to safely store your bottle right at hand. An internal zippered pocket allows you to safely store your phone, charger and other smaller items for convenient travel. You can prevent the movement of stored items by using internal cable ties. The sliders of the external zippers can be locked together for added security. Meets the carry-on baggage requirements of most airlines. The outer shell fabric, lining and mesh are made from 100% recycled polyester from recycled plastic bottles. The 600D waxed canvas outer fabric is highly durable and features a toxic-PFC-free, water-resistant finish to repel moisture, dirt, and stains. Exterior finish with an elegant patina of signs of use. All Thule Aion products are bluesign® certified. Colour: nutria Material: Waxed P600 Polyester External dimensions: 33 x 23 x 52 cm Volume: 40 l Weight: 1.40 kg Colour: khaki Volume: 40 l Laptop pocket: 15" diagonal, 16" diagonal Material: Polyester