A4 Challenger


A4 - frontA4 - inside bladder pocketA4 - inside front pocketA4 - rear


With a whopping 9.0L of smart storage capacity and a 3.0L Shape-Shift™ bladder, the A4 CHALLENGER™ is designed for epic adventures. The NDMT™ harness keeps the pack exactly where it’s intended – secure on your back.



  • NDMT™ (PAT.PEND) 4-point suspension harness
  • Multi size adjustment for individual fit
  • 3,0L (100oz) Shape-Shift™ Bladder
  • Big flow 45 degree bite valve
  • Compression bladder pocket
  • Water-resistant media pocket
  • Internal organizer pocket
  • Hydration tube clip



  • Volume: 9 L
  • Hydration capacity: 3,0L (100oz)
  • Weight: 695g *Inc. bladder
  • Dimensions: L 45cm x W 32 cm x H 8cm
  • Sizing: M-XL (one size) multi size adjustment



We recommend wiping your pack with a damp cloth to remove dirt. If the pack is extremely dirty and needs a deeper cleaning, soak it in cool or warm water with a very mild soap. Rinse the pack thoroughly with cool water. If soap residue remains in the fabric, it may create suds if exposed to water or sweat.

*DO NOT wash your pack in a washing machine. Machine washing may damage the pack or affect the integrity of the fabric and fasteners, and will void the USWE® Guarantee.