PURPOSE BUILT FOR RUCKING A TWO MILLION YEAR LEGACY Rucking has been around for over two million years. Our bodies evolved to efficiently carry weight back to the tribe, high and tight on our backs. Two thousand years ago, Roman Legionnaires used rucking as a test to select their best soldiers, a practice that continues with today&&';;s Special Forces. And the body remains as da Vinci drew it, elegant in its creation and refined to ruck weight over time and distance, on our backs. This is the life we choose. The RuckerA(R) 5.0 supports for your spine&&';;s natural curvature while you&&';;re out crushing calories, building strength, and saving your joints one step at a time - and it retains the fit and feel that is as timeless and natural as the human body. The Rucker is the greatest and most comfortable rucksack ever built. Though many imitators exist now, it has no equal. The only thing tougher and more elegant than the Rucker is the person using it, and that means you. NEW FOR 5.0: Lumbar Support: A "damn that&&';;s big" foam pad designed for maximum lumbar and lower back support. Magnetic Internal Pockets: Upgraded internal storage with silent, snag-free magnetic closures for quick and secure access that will not get crushed like zippers and function way better than VELCRO.