Berghaus Military Vulcan IV Size 2 Backpack Review June 16, 2018October 26, 2018 - Corsairier Back System: Cyclops II Dimensions: 72 x 34 x 28 cm Fabric: Main body: Ardura 1000D Weight: 2.9KG Introducing the Berghaus Military Vulcan IV Size 2 Backpack from Berghaus Military.