Style and function are the two greatest attributes of the Master-Piece Leather Trimmed Cordura Backpack ($645). The perfect carry-on size, the Master-Piece Leather Trimmed Cordura Backpack is bigger than a standard backpack, notes two shoulder straps and a padded backing for easy portability, and can also be used on its side with the included across-the-body strap as a conventional duffel. Inside, two large compartments and multiple internal pockets keep your gear neatly organized, while the maroon cordura material is both waterproof and durable. Lastly, sturdy d-rings add additional security and another level of style to the already great-looking backpack. You can pick up the Master-Piece Leather Trimmed Cordura Backpack exclusively at Mr. Porter.