Crumpler has turned itself into a household name because of its functional, long-lasting, and sturdy bags for all kinds of activities, from going to school to backpacking across the country. This Australian company has launched an array of bags, including the Crumpler Mantra. The Mantra is a flawless combination of style, functionality, reliability and comfort. While it may look like a fashionable city bag, the Mantra was built for the road. Spacious and heavy-duty, this weatherproof backpack is enough to fit everything you could possibly need.