Ergonomic in its design, the Stryd 26 Rucksack from Vango sits comfortably on the back leaving lots of room for shoulder & arm movement with its tear drop shape. Also, in using the Air Force back system, chest strap & sculpted shoulder straps, the Stryd 26 Rucksack from Vango has a snug fit which remains stable during activity. The design team have selected a 420 denier Cationic Nylon (three times stronger than Polyester) for this pack creating a stunning two tone effect when the pac is in sun light. This backpack blends the best of outdoor performance with urban good looks & is as happy in the hills as it is on the underground.