Arc'Teryx Naos 70: From the Arc'teryx AC2 line of waterproof, welded construction packs, the Naos is the biggest of the lot. Minimalist design combined with a tough, waterproof packcloth that is welded together to make a completely dry backpack, the Naos 70 is great for die hard, long distance pack rafters, or just folks who spend a lot of time out in the backcountry in places that get pretty wet, or even as a combination drybag/backpack on a raft trip.