Arc'teryx Bora 80 Pack, Size Regular in The Yard Sale Posted July 24 Arc'teryx Bora 80 backpack, size Regular (18-21" torso), 77 Liters. Excellent condition! I bought this pack shortly after getting into mountaineering, around 2009. I only used it on a few trips over a couple years before I realized it was just too large for my needs. I've held onto it because it's an awesome pack, but I haven't used it in years so I think it's time clear some space in the gear closet. $300 OBO Located near Seattle.