The lightest backpacks for serious kilometres

When every gram counts, our range of ultralight backpacks is built to shave weight without cutting corners on durability or comfort. We stock some of the lightest backpacks on the market, engineered with minimalist frames and pared-back features so you carry less and move faster, without sacrificing the support you need over long distances. If you're chasing the absolute lightest weight backpack for a fast-and-light mission or a multi-day thru-hike, this is the range built for it — the same standard our emergency services and military customers trust when weight genuinely matters. Looking for something with a bit more structure? Check out our 40L Backpacks collection or Osprey Backpacks: The world's greatest hiking packs. Shop the full range at pastoutdoors.com.au, with same day dispatch before 4pm AEDT.