The travel backpack for an active lifestyle Thule Aion 40L travel backpack features a removable rolltop bag and has the maximum capacity still classified as carry-on compliant, making it the perfect backpack for air travel. The backpack's removable rolltop bag has a TPU lining that ensures odor, moisture and dirt doesn't spread to the rest of the bag. It's also easy to clean and is perfect for storing sports gear or dirty clothes. The carry-on bag has dedicated areas for electronics storage and a water bottle pocket. The Thule Aion Sling (sold separately) can be used together with this travel backpack as a hip belt for extra weight-bearing support and quick access to essential items. Bluesign certified and made from durable recycled materials The shell fabric, lining, and mesh are made of 100% recycled materials. The bag's rugged and durable waxed canvas fabric develops even more character as it ages and has a water-resistant finish that is free from toxic PFCs. All Thule Aion products are bluesign certified, which ensures the protection of workers, consumers, and the environment. Tested to the limit At the Thule Test Center in Hillerstorp, Sweden, products go through extreme testing. Our roof rack systems are designed to carry your gear and fit your car as safely and securely as possible. Below are just a few examples of the many tests conducted. Quality that lasts: All Thule bags are rigorously tested to ensure they will stand the test of time. Our luggage even goes through an extensive 50 tests before it's given the Thule logo. Bluesign system members: We are partners of the bluesign system, an international standard for textile production aimed at reducing the impact of manufacturing on people and the planet. Responsible sourcing and logistics: We obey the principles of the UN Global Compact, as well as ILO and OECD guidelines, and conduct strict audits to ensure our suppliers respect human rights, labor laws, health and safety, and the environment. Features: R