For backpacking, thru-hikes and alpine expeditions, the Aether AG? Series has a pedigree like no other pack. We set the bar for technical backpacking packs by combining Anti-Gravity? technology with customizable fit and innovative features to create a more capable and comfortable pack for long-haul load carrying on any multi-day excursion. When you need a pack that can carry heavy loads for up to a week, there is no better option than the Aether AG? 60.